1891 US CUSTOMS SEAL PADLOCK

Here is another very interesting example of a Customs seal padlock and the first one that I have seen that came with a working key.

rare U S CUSTOMS padlock with a COUNTER covered by a GLASS window. which is housed on the side & coverd by a nice bronze weather covering..... .... each time that the lock is unlocked the counter moves 1 number...... FOUR digit counter..... lock comes with a nice locksmith made key & works the lock fine........... - eBay (11 Jan 2010)

This padlock had an opening bid of $1,450 (Plus $8.50 Shipping) but received no bids.

This similar padlock (but without a working key) last sold for $385 (here) and a second one for $348 (here).
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