Hey I've got one about the same vintage. The difference is the side to side adjustment is on the base not on the spring base.
Bought it off of ebay, was a old club trap, same brand Western. Works great, we take it to the public ranges often sometimes there is a shooter that knows what it is. I don't think you can wear it out as it's made of cast iron.
We have a Red devel and it's made of pressed sheet metal and I had to weld up the stress cracks to keep it going.
How old I'd say 40's to 50's vintage.
