WatchBuys
Cart
FAST and FREE shipping on all watch purchases.
Orders received by 4 PM ET ship the same business day.

Hardened Watch Cases



Hardened Watch Cases

These Sinn and Hanhart watches feature cases that have been hardened to offer extreme protection against scratches, wear and dings.

  • Sinn uses the term Tegimented to designate their watches with hardened cases, which may be made from stainless steel, submarine steel or titanium.

  • Hanhart uses a process called HD12™ which hardens the steel to 1,200 Vickers, or more than four times that of a standard stainless steel watch case.

Quick View
Price: $1,660.00
SKU: HA-123
HD12 hardened steel case
In StockHanhart Preventor HD12 Black Dial on Quick Adjust Bracelet In Stock
Quick View
Price: $1,390.00
SKU: HA-122
HD12 hardened steel case
In StockHanhart Preventor HD12 Black Dial on Strap In Stock
Quick View
Price: $1,660.00
SKU: HA-125
HD12 hardened steel case
In StockHanhart Preventor HD12 Blue Dial on Quick Adjust Bracelet In Stock
Quick View
Price: $1,390.00
SKU: HA-124
HD12 hardened steel case
In StockHanhart Preventor HD12 Blue Dial on Strap In Stock
Price: $6,470.00
SKU: SI-338B
Automatic winding mechanical chronograph
Price: $5,880.00
SKU: SI-338
Automatic winding mechanical chronograph
Quick View
Price: $5,630.00
SKU: SI-336
Automatic winding mechanical chronograph
In StockSinn 140 St Fully Tegimented SZ-01 Calibre on Strap In Stock
Quick View
Price: $3,570.00
SKU: SI-530

Limited to 300 Pieces

Historic two register pilot's chronograph
In StockSinn 155 S Bright Star Limited Edition In Stock
Price: $12,670.00
SKU: SI-0028

Limited to 100 Pieces

Tegimented Damascus titanium case
Price: $6,740.00
SKU: SI-441
Automatic winding chronograph watch with moonlight display
Quick View
Price: $6,180.00
SKU: SI-440
Automatic winding chronograph watch with moonlight display
In StockSinn 3006 Hunter Chronograph Fully Tegimented on Strap In Stock
Price: $6,370.00
SKU: SI-570
Pilot's chronograph based on historic Sinn cockpit clock design
Quick View
Price: $6,830.00
SKU: SI-571
Pilot's chronograph based on historic Sinn cockpit clock design
In StockSinn 717 SZ-01 Chronograph Fully Tegimented on Silicone Strap In Stock
Price: $2,970.00
SKU: SI-452
Automatic winding fully Tegimented
Price: $2,490.00
SKU: SI-451
Automatic winding fully Tegimented
Price: $3,580.00
SKU: SI-273

New Quick Adjust Buckle

Automatic winding with date function
Price: $2,750.00
SKU: SI-272
Automatic winding with date function
Price: $3,160.00
SKU: SI-271

New Quick Adjust Buckle

Automatic winding with date function
Price: $2,490.00
SKU: SI-270
Automatic winding with date function
Price: $3,580.00
SKU: SI-0015

Limited Production - New Quick Adjust Buckle

Fully Tegimented pilot's watch with sporty red seconds hand
Price: $2,750.00
SKU: SI-0014

Limited Production

Fully Tegimented pilot's watch with sporty red seconds hand
Price: $3,160.00
SKU: SI-0013

Limited Production - New Quick Adjust Buckle

Fully Tegimented pilot's watch with sporty red seconds hand
Price: $2,490.00
SKU: SI-0012

Limited Production

Fully Tegimented pilot's watch with sporty red seconds hand
Price: $3,710.00
SKU: SI-110

New Quick Adjust Buckle

Automatic winding with second time zone
Price: $2,880.00
SKU: SI-099
Automatic winding with second time zone
Price: $3,350.00
SKU: SI-085

New Quick Adjust Buckle

Automatic winding with second time zone
Price: $2,680.00
SKU: SI-084
Automatic winding with second time zone
Quick View
Price: $3,840.00
SKU: SI-277
Automatic winding with date function
In StockSinn 857 Black Fully Tegimented on H-Link Bracelet In Stock
Price: $3,280.00
SKU: SI-276
Automatic winding with date function
Price: $3,460.00
SKU: SI-275
Automatic winding with date function
Price: $3,030.00
SKU: SI-274
Automatic winding with date function
Price: $3,970.00
SKU: SI-225
Automatic winding dual time zone with Tegimented case and bracelet
Price: $3,410.00
SKU: SI-226
Automatic winding with second time zone
Price: $3,590.00
SKU: SI-187
Automatic winding with second time zone
Price: $3,160.00
SKU: SI-176
Automatic winding with second time zone
Price: $5,940.00
SKU: SI-319

Final Call

Automatic winding chronograph watch on bracelet
Price: $5,480.00
SKU: SI-228

Final Call

Automatic winding chronograph watch on Tegimented bracelet
Price: $4,920.00
SKU: SI-229

Final Call

Automatic winding chronograph watch on strap
Quick View
Price: $4,770.00
SKU: SI-454
Two register chronograph Sinn SZ-05 calibre
In StockSinn 936 Chronograph Fully Tegimented on H-Link Bracelet In Stock
Quick View
Price: $4,290.00
SKU: SI-453
Two register chronograph Sinn SZ-05 calibre
In StockSinn 936 Chronograph Fully Tegimented on Strap In Stock
Price: $5,270.00
SKU: SI-0083

New 2026 Release - Limited to 100 Pieces

Two register chronograph Sinn SZ-05 calibre
Price: $4,680.00
SKU: SI-419
Emergency rescue watch with PulseRotor
Quick View
Price: $3,650.00
SKU: SI-0050

New Release

Tegimented dive watch with DLC finish and left hand crown
In StockSinn EZM 3 S Divers on H-Link Quick Adjust Bracelet In Stock
Quick View
Price: $2,820.00
SKU: SI-0049

New Release

Tegimented dive watch with DLC finish and left hand crown
In StockSinn EZM 3 S Divers on Strap In Stock
Quick View
Price: $3,870.00
SKU: SI-0066

Limited to 100 Pieces in North America

Tegimented DLC dive watch with white dial
In StockSinn EZM 3 SW Divers Limited Edition In Stock
Quick View
Price: $3,840.00
SKU: SI-475
Fully Tegimented with blue dial
In StockSinn U1-T Blue Dial Fully Tegimented on H-Link Bracelet In Stock
Price: $3,740.00
SKU: SI-476
Fully Tegimented with blue dial
Price: $3,840.00
SKU: SI-255
Fully Tegimented submarine steel
Price: $3,740.00
SKU: SI-258
Fully Tegimented submarine steel
Quick View
Price: $4,130.00
SKU: SI-407
The all black DLC Tegimented U1
In StockSinn U1-T S Black Fully Tegimented on H-Link Bracelet In Stock
Quick View
Price: $3,930.00
SKU: SI-478
Fully Tegimented with blue dial and black case
In StockSinn U1-T S Blue Dial Fully Tegimented on Silicone Strap In Stock
Quick View
Price: $4,330.00
SKU: SI-0072

New Release - Limited to 300 Pieces

Fully Tegimented dive watch with hybrid ceramic luminous dial
In StockSinn U1-T S L Fully Tegimented Limited Edition on H-Link Bracelet In Stock
Quick View
Price: $4,130.00
SKU: SI-0071

New Release - Limited to 300 Pieces

Fully Tegimented dive watch with hybrid ceramic luminous dial
In StockSinn U1-T S L Fully Tegimented Limited Edition on Silicone Strap In Stock
Quick View
Price: $3,960.00
SKU: SI-018
Fully Tegimented diver's watch with black bezel and blue dial
In StockSinn U1-T SDR Blue Dial Fully Tegimented on H-Link Bracelet In Stock
Price: $3,940.00
SKU: SI-340
Fully Tegimented submarine steel
Price: $3,840.00
SKU: SI-391
Fully Tegimented submarine steel
Quick View
Price: $4,130.00
SKU: SI-410
The all black Sinn U1 SE with ivory SuperLuminova
In StockSinn U1-T SE Black Fully Tegimented on H-Link Bracelet In Stock
Price: $3,930.00
SKU: SI-409
The all black Sinn U1 SE with ivory SuperLuminova
Price: $4,230.00
SKU: SI-267
Fully Tegimented submarine steel
Price: $4,130.00
SKU: SI-234
Fully Tegimented submarine steel
Quick View
Price: $4,520.00
SKU: SI-214
Mechanical diver's watch with two time zones fully Tegimented
In StockSinn U2-T S Black EZM 5 Fully Tegimented on H-Link Bracelet In Stock
Price: $4,330.00
SKU: SI-206
Mechanical diver's watch with two time zones fully Tegimented
Price: $4,330.00
SKU: SI-0040
Fully Tegimented submarine steel with SDR black bezel
Price: $4,030.00
SKU: SI-0070

New Release

Midsize mechanical dive watch with blue dial and hardened case
Price: $4,030.00
SKU: SI-029

Limited to 1,000 Pieces

Fully Tegimented dive watch with engraved dial
Price: $3,740.00
SKU: SI-025

Limited to 1,000 Pieces

Fully Tegimented dive watch with engraved dial
Quick View
Price: $4,030.00
SKU: SI-520

New Quick Adjust Buckle

Midsize U-Series fully Tegimented diver's watch
In StockSinn U50-T Fully Tegimented on H-Link Quick Adjust Bracelet In Stock
Price: $3,740.00
SKU: SI-519
Midsize U-Series fully Tegimented diver's watch
Price: $3,090.00
SKU: SI-179
Fully Tegimented midsize diver's watch with quartz movement and oil filled case
Price: $3,760.00
SKU: SI-181

New Quick Adjust Buckle

Fully Tegimented midsize diver's watch with quartz movement and oil filled case
Price: $3,470.00
SKU: SI-180
Fully Tegimented midsize diver's watch with quartz movement and oil filled case
Price: $3,250.00
SKU: SI-159
Fully Tegimented midsize diver's watch with quartz movement and oil filled case
Price: $4,080.00
SKU: SI-172

New Quick Adjust Buckle

Fully Tegimented midsize diver's watch with quartz movement and oil filled case
Price: $3,670.00
SKU: SI-161
Fully Tegimented midsize diver's watch with quartz movement and oil filled case
Price: $3,190.00
SKU: SI-183
Fully Tegimented midsize diver's watch with quartz movement and oil filled case
Price: $3,860.00
SKU: SI-232
Fully Tegimented midsize diver's watch with quartz movement and oil filled case
Quick View
Price: $4,350.00
SKU: SI-512

New Quick Adjust Buckle

Midsize U-Series fully Tegimented diver's watch
In StockSinn U50-T S Black Fully Tegimented on H-Link Quick Adjust Bracelet In Stock
Quick View
Price: $3,940.00
SKU: SI-511
Midsize U-Series fully Tegimented diver's watch
In StockSinn U50-T S Black Fully Tegimented on Silicone Strap In Stock
Price: $3,960.00
SKU: SI-522
Midsize U-Series fully Tegimented diver's watch
Price: $3,860.00
SKU: SI-521
Midsize U-Series fully Tegimented diver's watch
Price: $3,840.00
SKU: SI-342
Fully Tegimented submarine steel
Price: $4,130.00
SKU: SI-413
Diver's watch with quartz movement and oil filled case
Price: $3,940.00
SKU: SI-238
Diver's watch with quartz movement and oil filled case
Price: $3,940.00
SKU: SI-598B
Fully Tegimented submarine steel with black bezel
Price: $3,860.00
SKU: SI-598
Fully Tegimented submarine steel with black bezel
Price: $3,840.00
SKU: SI-343
Fully Tegimented submarine steel
Quick View
Price: $3,740.00
SKU: SI-348
Fully Tegimented submarine steel
In StockSinn UX-T EZM 2 B Hydro Fully Tegimented on Silicone Strap In Stock
Price: $4,130.00
SKU: SI-293
Diver's watch with quartz movement and oil filled case
Price: $3,940.00
SKU: SI-237
Diver's watch with quartz movement and oil filled case
Price: $3,940.00
SKU: SI-587
Fully Tegimented submarine steel
© 2026 BluePointe, LLC dba WatchBuys®. All Rights Reserved