Dr No[Moderator Omega - Wristscan]
37745
GUB movements are . . .
. . . typically robust, and the cal 90 . . .
. . . is no exception. The anecdotal evidence I can share pertains to one of my cal 39 perpetuals, which survived a two-foot drop onto a tile floor without mechanical damage . . . the case suffered an indignity, but the cal 39 soldiered on without incident.
No need for concern unless you're playing tennis, golf, or the like.
Cordially,
Art