Need replacement window crank handle

Question

Based on the markings on this handle, I believe it is a TRUTH handle.  However, I don't know the the spline size.  I measured the opening it looks like it is a little less than 3/8.  Can you confirm from the pictures.

Tom · Accepted Answer

If this is a Truth handle, then the hole diameter should be 11/32", not 3/8". You should double check to make sure, because it definitely looks like a Truth handle. That's not a measurement I can eyeball from a photo so you will need to measure as carefully as you can and use your best judgement.

Assuming it is 11/32", you can use our 39-205 handle.