Need replacement cranks, not sure what to buy

A quick learner from Cape Coral, Florida says:
The only markings I can make out are on the inside of the actual turn handle. 60-C-11500-11

I was afraid to take off any of the working ones, but I suppose ai can if needed.
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Casey from SWISCO responded:

Hello,

We'd be happy to look into this for you but the diameter of the hole that attaches to the window linkage is an important factor, which we can't determine with the part still partially installed. What I can see of your assembly reminds me of the 39-194 but the bottom installation hole measures 1-3/8" apart rather than 1-1/8". Take a look and feel free to get back to us with more photos and dimensions to research your replacement options further. Thank you! 

Dimensions for 39-194
Dimensions for 39-194

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