You've done it again! All right, you know the rules... next one's mine. Seriously, the gold-plated movements are uncommon. As Chris has recently pointed out, they all seem to have movement number 4217xxx. p.s. Is that band real chicken?
MMMD, I did a Google search of images of the cal. 135. It seems there were gold-plated movements with earlier (lower) numbers, but I suspect there was a last run of them in 1953 in the 4217xxx range, as I have seen none later, and, as you point out, several right in that range, including your own. The band, alas, is merely crocodile.