'Terrain' Cat.3 Field Watch (40mm) | Seal Black NATO


The Terrain is our contemporary take on the classic 20th Century service issue watch. The retro-pattern Cat.3 edition is inspired by 1950s 'maximum legibility' NATO design specifications, with a hybrid mechanical/quartz movement, built in Zurich, and paired with a one-piece waterproof strap made in Italy from sustainably-sourced rubber.

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

Water-resistant to 10 ATM (100 metres, 330 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 Seal Black NATO edition is distinguished by its black NATO-style rubber strap.


The Terrain Cat.3 is powered by the Seiko VH31 Hybrid Quartz Movement, an ultra-low maintenance hybrid mechanical/quartz movement, combining the accuracy and robustness of a quartz movement with the elegance of a sweeping second hand. It is exceptionally accurate, highly serviceable and ready for generations of active use.

MOVEMENT | Hybrid mechanical/quartz, 2 jewels, 14,400 bph (4 per second)


CALIBRE | VH31 Manufacture Seiko

FUNCTIONS | Centre hour, minute and sweeping seconds hand

POWER RESERVE | Battery life approximately 2 years


Water resistance to 10 ATM (100 metres), the Terrain's 316L stainless steel case is fitted with a pressurised screw-down caseback and screw-down crown. 

CASE ARCHITECTURE | Screw-down case back 

WIDTH | 37.5 mm (excluding crown) / 40 mm (including crown) 

LUG-TO-LUG | 45 mm / STRAP WIDTH | 20 mm 

WEIGHT | 52 grams (excluding strap) 

CASE THICKNESS | 11.5 mm (measured at the centre of the watch) 

CASE MATERIAL | 316L steel

CRYSTAL | Sapphire Crystal 

CROWN | Screw-down 

WATER RESISTANCE | Waterproof to 100 metres / 330 feet


Made from sustainable rubber in Veneto, Northern Italy, our straps are manufactured in partnership with a small family business that prides themselves on a long-standing tradition of making accessories for the Swiss watch industry as well as many of the world’s finest brands.

This NBR compound rubber performance strap is 100% vegan and toughened to withstand the most active outdoor and ocean pursuits. Buckle holes are semi-punched on the strap underside – enabling you to select a single hole for optimum comfort and maintain a clean, minimal finish.  

COLOUR | Seal Black (black) 

LENGTH | 275 mm 

COMPATIBILITY | 20 mm Lug Width 

STRAP MATERIAL | Natural Rubber 

STRAP STYLE | One Piece 

CLASP STYLE | Buckle (with monogram)

CLASP MATERIAL | Stainless Steel (satin 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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