Axle seal, rear outer

[1937Firewood]

I just got done doing a 1937 Ply PT 50 and mine are the same size as yours.  The part Number is SKF 20380   Amazon has them at $33.61 EA OR E-bay $22.93  both have free shipping. If you need a picture of my old ones let me know.  Cheers

[Blackcoupe230]

I have a 1935 Plymouth PJ deluxe business coupe. I am putting new brakes on it and need new rear outer axle seals. The online company says the ones for my car 1934-1935 are out of stock. However, the axle seals for 1936-1942 Plymouths are in stock. The seal looks the same, 4 1/2" flange with 5 bolt holes. Can anyone tell me if this is the same seal? Or what is the difference?

Thank You Dana Robinson