I've never seen a flap handle any color other than black. Can not comment on the trim housing color.
Well after looking VERY closely at the picture and doing some detective work with both the A and B model IPCs I've come to a conclusion.
And that is we can't be sure it this is a late 51 or an early 52.
Here is the tally as I see it. First it can't be a '53, they are totally different as George has pointed out. It can not be an early A model because it has the later rudder pedals which started at serial 19184.
So looking closer at what we can see. Just behind her hand as part of the upholstery is a dark square. This is only depicted as dashed lines in the B model IPC and what it is is a protective patch for the head phones that hung on a hook above it. But that is not conclusive as the A models could have a hook and it is located at the same spot. So this patch just might not be illustrated in the A model IPC.
Then there is the heater cover. It is clearly an A model style which let air escape from both sides. The B model heater had a different design baffle that only let air escape towards the center of the pilots feet. This is clearly shown in the IPC. But this could still be a 52 using parts left over from the 51.
CAUTION - My forum posts may be worth what you paid for them!
Bruce Fenstermacher, President, TIC170A
N7A '49 170A -More original than most making folks GREEN with envy
N42532 '45 J-3 Clipped Wing Cub