Truth Dyad Operator like 39-315, only smaller

A home owner from Grafton, MA says:
Do you have a smaller size variant of the 39-315 Truth Dyad Operator? Mine in the attached picture says "Truth" stamped into the underside of the bent arm. The hole spacing on the body is 3", but the straight arm length is only 4" and the bent arm dimension is only 2-3/4" (measurements taken per dimension annotations in the 39-315 product picture).
User submitted photo of their window hardware.
A home owner from Grafton, MA says:
I found a barely-stamped part number on the linkage arm: 21550
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Thanks for posting. Please see if the 39-317 matches up to your operator.
A quick learner from Grafton, MA says:
It does - thanks Dave! I wonder why the 39-317 didn't come up in any searches (Google or otherwise), only the 39-315 did. But the 39-317 looks like a perfect match.
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