'Terrain Black' Cat.4 Field Watch (38mm) | Limited Edition


The Terrain is our contemporary take on the classic 20th Century service issue watch. The 'Terrain Black' Cat.4 edition is inspired by the original 1960s Vietnam watch design specifications, with fully automatic 24-jewel movement and plated in non-reflective PVD.

Rotate North's design principles; purpose, performance and planet, have informed every detail of the Terrain. The black dial is protected by authentic plexiglass/acrylic, with the hands and markers set in LumiNova, ensuring legibility whatever the conditions. 

Water-resistant to 5 ATM (50 metres, 165 feet), you can take the Terrain with you on even the most testing hiking, climbing, or wild swimming expedition. However, it's also an easy watch to wear every day, comfortable and understated.


The Terrain Black is powered by a self-winding NH35a, 21,600 bhp automatic, 24 jewel movement, with 41 hour power reserve when fully wound. This robust, mechanical movement is powered entirely by renewable energy drawn from the wearer's own arm movements - no batteries are required. It is exceptionally accurate, highly serviceable and ready for generations of active use.

MOVEMENT | Mechanical, 24 jewels, 21,600 bph (6 per second). NH35a Manufacture Seiko 

WINDING | Bi-directional Self Winding via rotor. Additional Manual Winding  

POWER RESERVE | Approximately 41 hours 

SHOCK SYSTEM | Diashock 

FUNCTIONS | Centre hour, minute and second hands, 24-hour format


Water resistant to 5 ATM (50 metres), the Terrain's 316L Black PVD-plated stainless steel case is fitted with a pressurised screw-down caseback and screw-down crown. 

CASE ARCHITECTURE | Screw-down case back 

WIDTH | 36 mm (excluding crown) / 38 mm (including crown) 

LUG-TO-LUG | 43 mm / STRAP WIDTH | 18 mm 

WEIGHT | 70 grams (excluding strap) 

CASE THICKNESS | 12.9 mm (measured at the centre of the watch) 

CASE MATERIAL | 316L Black PVD-plated stainless steel  

GLASS | Plexiglass / Acrylic 

CROWN | Screw-down 

WATER RESISTANCE | Waterproof to 50 metres / 165 feet


Finished in plain black, this band is made from fast-drying ballistic nylon that can easily be removed from the watch, and washed and dried within minutes. The robust, durable feel is completed with stainless steel fittings and buckle components with a satin finish.

Designed to hold the watch securely under the most testing circumstances, this strap is durable, breathable and comfortable enough to wear every day.

COLOUR | Seal Black (black)

LENGTH | 300 mm 

COMPATIBILITY | 18 mm Lug Width 

STRAP MATERIAL | Ballistic Nylon 


CLASP STYLE | Buckle (no monogram)

CLASP MATERIAL | Black PVD Coated Stainless Steel (matt black finish)

Shipping & Returns

We offer FREE Express Worldwide Shipping, in partnership with DHL Express.

All orders are fulfilled within 1 business day of the order date. Purchases made after 2 pm GMT will not be shipped until the next business day.

You will receive an email with tracking details from DHL once your order has been dispatched.

All delivery times below are in business days.

  • United Kingdom: 1-2 Days*
  • North America: 2-3 Days*
  • European Union: 1-2 Days*
  • Australia/Hong Kong: 3-4 Days*
  • Rest of World: 2-6 Days*

*These delivery times are based on estimates provided by DHL and we cannot guarantee delivery time.

We are confident you will enjoy your beautiful Rotate North accessories as much as we do, but if for any reason you change your mind and would like to make a return, we are happy to accommodate you and issue a full refund.

Returns can be accepted within 30 days of the original purchase date.


We offer a 2-year limited warranty to repair or replace any defective material or component. It does not cover any issues due to normal wear and tear, misuse, or loss/theft.

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