Window crankshaft mechanism

Hello,

Your photos resemble the old style version of the 39-092 and 39-091 Roto operators. We also carry the 39-230 handle and the 39-224 folding handle. Unfortunately, the link arms are no longer available, so you would need to reuse the originals if possible. Take a look at these operators, along with the related videos. Thanks for posting! 

Full view with measurements

Side profile view with measurements