Technical Please help identify these seats.

I purchased a pair of front and rear reupholstered seats, unfortunately, they are not what the seller represented, and now I do not know the year, make or model they belong in.

The front of the backrest, of the front seat, is 52" wide and 24" from seat to the piping on the top of the seat.

The seating area of the front seat is 48" wide, and the depth is 19".

The backrest portion of the rear seat is 50.5" at its widest and narrows to 45" where it meets the seat.

The seat of the rear is 51" at the widest and narrows to 45" where it meets the back.

There is a metal tag under the rear seat that says:
H61826
M.S.W. G147
BP 9-2811

 

They look like they are from a 1940's 4 door sedan. No idea of the make though.