Is the 39-430 the replacement part for an OP051506?
Pic attached
Dave Sr. from SWISCO responded:
July 20, 2016
Please take a look at our 39-325 operator. I believe this is a newer version of the one you show in your photo. You will also need the newer style handle, since the bore is different; either the 39-114L or the fold down type, 39-205.