37 - Early 38 Early Distributor Question

[BillCNC]

Hey All,

I've torn down the distributor on my newly acquired 37 - early 38 engine and I'm cleaning it up and noticed the #68 part number was crossed off and remarked 11A as shown in the picture.

My question is, was there a part number change with the distributor weights, if so when and why?

I'm asking because my engine is a 37-early 38, an oddball in some respects. I don't think this engine has seen a car or truck because it was the power supply for a generator. I'm not sure if this engine is just a mashup of leftover parts and made into an industrial engine or if some later parts are involved.

I don't need to replace anything other than the Vacuum Brake Plunger, seal, & spring #18-12220 & #18-12205, but I'd like to get as much info as I can before ordering other parts if it comes to that.

Regards
Bill