If you’ve read the Diver Page (https://sweep-hand.org/citizens-vintage-divers-1962-to-1980/), you’ll have seen some commentary in the 52-0110 section about dial variations and questions about whether there was ever a blue bezel insert for this (and other 150m divers). The conclusion was that it’s more likely that the blue colour is the result of UV fading of the original black insert, even though there has been an after-market blue insert available as well as black ones. Bert has sent me a nice photo of his 52-0110 with blue insert- I particularly like the background 😉 :
I’m interested to know what other people think – is this a blue bezel insert, or is it faded black? Bert noted that his is from 1977, as is the one shown via a link in the diver article. What do you think?