Are there any identification numbers stamped on tools?
The "T" handle with only half a handle differs from Mercury Service Tool 510
(compare working ends)
Probably every mechanism worth repairing had either factory or vendor service tools
sometimes both. Identification of who, what and where used sometimes puzzling as
only those "in the know" were aware of and/or used them. Sometimes a very handy
service tool will turn up at a flea market or swap meet. It takes a sharp eye and a keen
memory to spot a gem in a mixture of this, that and the other.