You can check out the Pella 39-109B, but I'm not familiar with your part number, so I'm not sure what to recommend. Compare the parts to see if you can use ours. If not, send a photo of the handle.
A home owner from Fort Wayne says:
June 15, 2018
I have a copper looking crank which says x429 on the back. I was wondering what the part number would be.