Hello all, I'm new to this forum, and this is only my second post since my first introductions post. I'm researching buying an Omega Speedmaster Pro, and considering various different models. My first choice is a 3753.50, but I'm researching other models/references as well. Does anyone happen to know the reference no. for the Speedmaster with sapphire crystal and standard stainless case back (the one with the sea horse in bas-relief)? I pretty sure I've seen these, but have not been able to locate a reference number or numbers. Also, how many posts are required before placing a WTB? Any help most appreciated, thank you! Cheers, Stephen aka Puma Cat.