Pre-Order Borealis Santa Cruz CuSn8 Automatic Diver Watch


Staff member
Would like to present you the Borealis Santa Cruz CuSn8 300m Automatic Diver Watch powered by a Seiko NH38 (no date) movement.

The Borealis Santa Cruz 300m Automatic Diver Watch is powered by a Seiko NH38 No Date Automatic Movement and is inspired in vintage italian divers coupled with our own flare of modernity and timeless design.

This automatic men's automatic diver watch is built to last with a CuSn8 bronze case, sapphire crystal with anti reflective coating applied underneath and a hand made leather strap with a custom CuSn8 bronze buckle.

The Borealis Santa Cruz series is available in two distinct dials type A and B both sandwich with old radium X1 lume.

It features a total height of 14.05mm making it versatile and possible to use in most occasions.

The sandwich dial, watch hands are lumed with Swiss Made RC Tritec old radium X1 lume applied to it in order to guarantee a perfect illumination and easy readability in darkness.

Technical Details of the Borealis Santa Cruz CuSn8 Bronze Black Date 300m NH38 Automatic Diver Watch:

  • CuSn8 Bronze Case
  • Sandwich Black Dial with Swiss Made RC Tritec Old Radium X1 lume applied to indexes
  • Seiko NH38 Automatic Movement without date
  • Premium calf leather strap with a custom made CuSn8 bronze buckle
  • Case diameter: 42.00 mm without crown
  • Case Lug to Lug distance: 50.50mm
  • Lud Width : 22mm
  • Bead blasted finish for faster patina
  • 12 months warranty
Note: Be aware bronze is a living metal league and therefore patina, discolouration in metal , spots, can / are to be expected with reaction to atmosphere and each individual watch reacts differently.

The watches are already being produced. Delivery expected to happen around mid April.


Master Apprentice WIS
any chance you guys will make a different buckle for the bronze? I have ordered the batial and bullshark and they both had the same buckle which I am not a big fan of.. Otherwise this is a great offer.


Staff member
Some extra photos showing how patina develops quite fast in a natural way due to the bead blasted finish.



Master Apprentice WIS
Both arrived yesterday and I’m definitely more drawn by this one:

So I did a quick swap

I’ve never seen any patina like this. Almost like raw titanium sometimes.

Quick lume shot before a brasso shower

I’ll clean up around the crown better some other time

So that’s that !

I’m not into doing reviews, I’m a fan and I asked for these so I won’t make a super biased review. Just sharing cus I love sharing what I love.


Staff member
trying out different shoes on the Borealis Santa Cruz type B prototype. Delivery in a couple of weeks time. Limited stock available now.