the only thing you have to be carefull with the 187 is the date pusher. DONT SCREW IT TOO HARD
i bought one when they first came out and i the first time i used the date pusher, i srewed it in too hard and it broke. sold the watch some weeks after that.
i bought another 187 from a member and received it 2 days ago, the previous owner never had a problem with the watch and it was perfect when i received it.
once again, after adjusting the date, i screwed the pusher in too hard and broke......again.
the date pusher does not screw in like a crown would do, its hard to know if its completely screwed in, when you fell a little resistance, dont go further.
i dont blame the watch, i blame myself, i would probably break the gen too