Well, there are a few around but it's pretty rare to find any straight lug Speedmaster that has never been near a polishing wheel and isn't too dinged up. Here's one of mine, the photos could be useful for reference.
@Ash, possible to see a straight on shot of the lugs? Like from the end? Trying to see the shape of the lug ends..
I wonder how much different it actually is to the FOIS case, would love to see the two side by side some time.
I think they're quite different.. I don't have side by side, but did compare in an AD to one of mine. The bevels on the FOIS are a fair bit bigger..
The FOIS case looks basically like a Professional without crown guards - really big, twisted bevels. Not really that close to the old ones IMO