40s-50s Woolrich Mackinaw button

[Raul]

I just bought a vintage Woolrich Mackinaw in very good conditions for its age, from the label it seems to be from late 40s to early 50s. No worn-out wool even on friction prone parts. There is some small repair to do but nothing important. The worst thing is a missing button (bakelite?) on one of the back pockets (pictures below), its diameter is about 3/4 inch (2 cm)
I looked on ebay for one with no success, anyone has a spare one or an advice about where I can find it? I know it's an hard task... Thanks anyway

 

[pop_artz]

I recently picked up a vintage Woolrich Mackinaw and immediately suspected most of the front buttons weren't original. The were black and didn't match the others. I landed on this old post and realized I wasn't the only one with the question on how to find the proper replacements. So far the closest I've found are these: https://www.ebay.com/itm/126576534563 I should have them in a few days.

 

[TLW '90]

This particular jacket is a model 503 hunting coat, to my knowledge it's not a mackinaw.
I know that's a popular buzz term used on ebay...etc to sell any vintage wool plaid coat, but a Mackinaw is specific type of jacket/ coat.

I bought a 1950's 503 early this year with the same rear buttons and the same issue with them , so I tested
to see if they were Bakelite.
I have no clue what other type of plastic they night be made of, but based on the test ( swab them with some 409 cleaner) they don't seem to be Bakelite.