Good news for you Michael - you got a good one !! Nice patina too.
This is the first execution that was sold with fluted pushers. All the relative points you raised about Pushers, colour of seconds hand & steel hands are correct for your watch. They did change the combination of parts for the other model executions but you need not stress as yours seems correct.
Here's my GMT, same execution

As for serial numbers i cant tell what the correct range is but i can tell you mine is not the same, mine is 3964xx
Hope that helps.
Cheers - Darren

: Hi,

: I would like to discuss my newest purchase, an Autavia 2446C GMT:

:
:

: During my research I've learnt to differentiate two sets of related
: features:

: - main hands: blank vs. red with red tips
: - chrono hand: white vs. red
: - pushers: normal vs. fluted

: As I cannot associate the attribute sets to ranges of serial
: numbers (mine has 1458XX) I would like to know whether the main
: hands are wrong or the other features are wrong (or this is a
: transitional variant).

: Here an image of the movement:

:
:

: Looking forward to the responses and comments of the experts and
: further discussion.

: Thanks,

: Michael