That was my guess too... What about the arrival of the Lever Style Clutch vs the Star Wheel ?
When did the Lever Style Show Up ?
I have bought a 13 Big Bore with a Lever Clutch. S/N and Cat No are both painted over and I have not picked up the lathe yet...
There are 2 bolts where the s/n should be - no clue what that's all about. The s/n's are always cut into the Bed (?)