Here's the Holland diver I got on Ebay a few weeks ago
Case ref is 11683, the same as the Rado Captain Cook Mk 1. But no serial numbers on the lug ends as the CC Mk1. Exactly the same case. The same crown also, but not signed. Bezel is bi-directional and does not click. 38 mm across excluding crown
Same hands as CC Mk1, but missing seconds hand. The dial is the same design except it is missing the rotating anchor. Original signage "Holland" and "automatic." Dial has not been refinished. It is a very dark charcoal colour.
The back is exactly the same as the Rado CC Mk1 and signed Rado Water Sealed with the same patent numbers and case ref 11683.
Movement is an A Schild AS 1700/01 17 jewels signed Holland Watch Co.
So, a puzzle. Anyone heard of the Holland Watch Co?
I bought this mainly for parts, but I think I'll keep it as is. It looks totally original, other than the hands being re-lumed. Pretty good nick also.