31876 stamped on arm. Date of 1/27/05 stamped under body of crank.
A quick learner from Saint Ignace, MI says:
January 28, 2022
Looking for what replacement I need. Arm is around 4 7/8". Body is around 5 1/8" wide.
Bob from SWISCO responded:
January 31, 2022
See our 39-220B and 39-221B Split-Arm Operators. These look quite similar; just make sure the dimensions match. For new cover and handle kits, see our 39-375 & 39-376, or our 39-451 & 39-452, depending on the style you prefer.