I need to identify window cage crank

Thanks for posting! Your casement operator resembles our 39-032 and its opposite 39-031. Take a look at the dimensions and compare them to your existing hardware to determine if this is the replacement you'll need.

Dimensions for 39-032

Your cover appears to be part 39-107 and the crank handle part 39-114. I've also linked a few other compatible handles and covers in case you may be interested in changing the style.