Vintage NOS National Oil Seal TWO 55166
The seal material appears to be leather/rawhide but not 100% sure they came off the shelf of a very old factory [Woolrich wool mill]
This is surplus to a now closed factory that kept spare parts on the shelf the boxes may show shelf wear and have some dust on them.
[Please Look at all the pictures they are part of the description]
[B1-F1-R1-S2-4]