Brass Registered Philippines Mail Padlock With Counter

As noted here, the US was not the only mail service using locks with counters. This example comes from the Phillippines:

Vintage 1950s (or earlier) brass registered Philippine Mail padlock with replacement key. On the side, the lock has a moving and working counter to indicate the number of times the lock has been opened and closed. Made in the Philippines by "Vicente Zamora". - eBay

This item sold for $88.88 (plus $8.78 in shipping)

Oddly enough, this sold for less than most US Registered mail locks sell for.

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