I have a crank handle similar to one of your 39-109B for Pella.
3/8" spline, 7/8" across, 4 inches (not 4 3/16) side to side, 2 3/4 (not 2 1/2) inches middle of spline to bottom, set screw on the bottom. Will your 39-109B work as a replacement?
Thank you!