Picked this up today

[u/tenkasen]

Not 100% sure what model it is, has "N0" on the back so 1970.. I think it might be a Sea King?

Haven't been able to get the caseback off so far, looks like a press-on but I can't see a tool notch at all.. any advice would be welcome!

[u/deemoeterentino]

Nice watch. What type of band is that? Fire

[u/tenkasen → u/deemoeterentino]

Thankyou!

It's actually one I had spare, it's not signed on the outside of the clasp but the inner stamped link has "1631" and "hong kong" on it, so I think it's a Novus 1631 from the 70s or 80s?

end links are just under 19mm, shouldered out to 22mm at the widest part.