I purchased this jig yesterday which I've not seen before. 2 bucks! I have a K2 which I've used for 20 years (still awesome), but this one must be from the 80's? Has a "4" on the bottom side and is one solid piece. I believe it is sand casted. Also does not have any discharge holes. Can anyone give me info on how old it might be?
Cleaned up nicely and will be going on my shelf of oldies right along with grandad's hand planes. Thanks!