Locate Model And Serial Number

Serial #s can be found on left edge of machine casting

Serial #s can be found on left edge of machine casting

Serial #s can be found on left edge of machine casting

Some older machines had serial #s on the left rear of the machine casting

51 class machines have a 3/8 inch main shaft on the left side

 

A and B models have 1/2 inch main shaft

 

You can tell an A from a B model machine see next 2 photos

A model Machine has no rear rocker

 

B Model Machine has rear rocker NOTICE 2 DIME SIZE SCREWS ON THE RIGHT REAR OF THIS PHOTO