I bought my Moon watch back in 2004. A couple of years before I was dreaming about a nice older one when a 145/345.0808 caseback came on the market. I have had it for twenty years now. I had forgotten about it.
What would be the right Speedmaster I should be looking for to finally install the sapphire caseback. I heard that reference 145.0808 comes from a Mexican series of Moonwatch in the early 80's? As I am in Arizona, it may be easier to find.
I know nothing about Speedmasters but you may get a better response if you start a fresh thread, 'Advice sought on Speedmaster sapphire caseback?', or something along these lines.