Hallo Tony,
It could be a pure fiction, but I have pics of 158, 159, 163 in this gray-green scheme with "new style" boss. So i presumed this change would affect all Tr.9s.
This number which is on my model is taken from "silver" 162, which could be wrong, but it could be right. I know for sure, that 162 in "old" scheme has same rounded styles like Seafires...This numbers under both wings were taken from Joe Maxwell's drawings in "I.A.C. Celebrates 100 Years Of Flight". And back then, when I was building this plane, I could not found any other underside views, or referencies on this particular part of plane.
There are missing rocket pods points under wings and now I reckon, this Brigade model conversion, has rear fuselage section too short. But it is usual, you get right information, when model is finished
This gray-green overall is, by my opinion Interior green, one reason for all: those planes were delivered after the war, in time, when too many aircrafts were no longer needed, manufacturers had piles of paints in their warehauses, already paid for, which needs to go, they can still use RAF cammo colours, but "new" interior colour is black and not green anymore, so they've used every opportunity to get rid of it... I am not sure if I.A.C. put down any requests on colour schme of these planes, though.
I know, that some Czech machinery manufacturers - Zetor, used German European sand colour, used on military vehicles during WWII, till late 50's
But it could be totaly different story....