This watch hobby sure is tough. I'm know, I'm new at it, but seems difficult to impossible to get information at times. I bought a slew of books, just as much, or more tools/ equipment, and inexpensive watches to practice on. There just doesn't seem to be any source or standard to guide a novice like me. If it wasn't for the forum help at times, I could be having a fire sale on ebay. My latest inability is to find ,or even understand PW sizes. I think I get the American sizes. But I have a couple of PW's that are 50 mm movements. I don't see that size on my American chart. I assume its European. No luck finding any size info there, other than they're mm.(I think) Forget about finding a case. I've yet to see one for sale over a size 18. I actually need a repeater-chronograph case. (If I find one of those my next stop is lottery tickets) Sorry for the rant, I do appreciate the help I get here.