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.

: Robert,

: Thank you for your reply.
: I wondered if there is an actual size difference between the
: subdials, I had that impression at first, but then I thought
: that it was due to the different hands & different font of
: the subdials.
: Very interesting.
: As far as my 3647's chrono hand is concerned, I believe it left the
: factory white: the watch spent its first 25 years in northern
: Africa, and whilst the dial has not aged, the hands & lume
: show aging. I believe that the hand started to discolour, and
: maybe the paint was taken off during a service? I bought it from
: the second owner, who got it this way 20 years ago... Maybe it
: started its life silver, but I doubt it!

: For now, I do not have a preference between these 2 and my 2447T.
: The 2 counters are more elegant, but the 2447 has that
: classic sixties layout :)

: If anyone has seen another early Carrera with a silver chrono hand,
: it would be interesting to know!

: L

: :