Well, maybe some of you have, but I am not aware of anyone pointing it out before.
The jacket shown in the photo below has a remarkably low yoke in comparison with what we are used to when we refer to the movie.

Just notice where the pleat starts!!
Now, the above jacket is the same jacket as this (notice the collar details)

and as this

and it has no relation to this

which in my opinion stars in most of the movie.
The result is that Peter's OTR jacket which features, bagginess, small collar, low yoke and long pockets* may not be SA, but could be very close to jackets that made it to the back of HF during the shooting of Raiders.
So, what do you think?
*
Just to remind you here, there are shots in the Raven bar where the jacket has long pockets.