However, in 1940 (and only 1940) the Brock was available in a solid coral gold version (also known as rose gold). It came with a two-tone enamel copper-colored dial with Roman numerals. The Coral Brock also features black baton-style hands.
The 1940 Coral Brock (and the yellow gold versions too) came with a 19 jewel, 14/0 sized 982 movement. In 1941 Hamilton introduced the 982M (as in Medallion) movement that would be used in solid gold watches. But in 1940 and years prior, all solid gold 14/0 sized watches got the 982 movement while gold filled models got the 17 jewel 980.
I recently had the opportunity to check out a Coral Brock and it's a very distinguished-looking watch. It's not very large, especially by today's standards so a woman could easily wear it as well.
They're not very common so it was great to have a chance to see one in person. If you ever happen to find one, I think the most challenging thing you might realize about them is it's just as hard to obtain a matching rose-gold buckle for the strap... try finding one of those!