A quick learner from CLARENDON HILLS ILLINOIS USA says:
May 3, 2017
TRUTH
RH 45136
US PAT 4505601
PAT CANADA 1986
UK PAT.2135397
please help find part i am struggling to locate it. it may be maxim? but i can't confirm
William
Tom from SWISCO responded:
May 8, 2017
Hi William. Please compare your measurements of your operators to our 39-315 and 39-316 to see if these could be a good match for you. Let us know how you made out!