From 5-26-2021:
"Which GMT hand do you have ?"
It is an 'OEM spec' aftmkt hand and it fits Ok after it was broached to fit...the ID was a hair too small, mostly paint. Do not know where it came from, it was included with the shortcut kit. The tip comes pretty close to the center of the outer 24H markers on the dial.
6-10-2021
I looked at my 'shortcut 1655' again just now and the 24H hand tip does reach about halfway or maybe a bit more than halfway past the the center of the small outer markers.
Keep in mind my dial and dial opening in the case are about .3mm bigger than OEM and the outer markers do not reach all the way to the edge of the case.
Imho a few tenths of a mm difference in 24H hands does not matter.
Here is a genuine 1655 with a shorter 24H hand:
Here is one with a longer 24H hand: