Choosing Hand Planes

[terrydowning]

You may also want to try determining the Stanley equivealent and trying here.

The length and width of the sole are your best bets for trying to figure out the Stanley equivalent.

Also since it's not a Stanley, the the threading could be normal.

http://stanleytoolparts.com/usa.html

A handle screw for a #4 smoother is $2.00 Lots of other parts as well. for a couple of bucks, it may be worth a try.