Not sure if this helps or not, but here is a great article on oil filters...Looks like it could be an S-2 type filter (1946-48). << Check that section out. I am referring to images 17 & 18.
Great oil filter debate

Oops, almost forgot...Installation instructions are are the bottom of the article. : )

Thanks,
-Paul

Last edited by Redfishangler; 05/16/2012 5:06 PM.