50-C-704 with "62" underneath. Your #39-286 also does not have set screw,
which we need due to worn splines on the operator..
Appreciate your help.
Charlie


Your operator is very old, so an exact match for the handle may not be available. That said, the 39-286 does have a set screw. You can even see it in the picture below. Could you get it to work?