: My recently purchased polygon back early (57xxx) 2447S has a silver
: chrono hand and silver subdial hands.

: Abel confirmed that they should be black and although I bow to his
: infinitely greater experience, I hadn't entirely given up hope
: that they might be original.

:

Congrats for the acquisition, mine is a 57xxx as well. Either some hands' paint was subpar and faded over time, or they left the factory this way.
The latter is least likely for sure, but you never know what a watch company in the sixties would do !
:)