Correct crank handle for a Truth 30706 casement crank mechanism.

I'm afraid I wasn't able to cross-reference that number to any one crank operator. It is most commonly related to the 39-533 casement window track, which works in tandem with about a half dozen different styles of operator.

Before we go any further, I'd like to see a photo of the operator itself. It would be ideal to see it out of the window, but at the very least I need to see as much as possible. Figure that the more of it is obscured by the window, the less likely it'll be that I can find a match.

Thanks for this photo. It looks like the worm gear came out of your operator; this would have looked like a corkscrew and is probably still attached to the handle itself. This usually comes out when the operator is over-torqued one way or the other during operation and is unfortunately irreparable. You will need an all new operator assembly.

We can help, but I will need to see the rest of the operator in order to ID a match. That includes seeing the arms, attachments, and everything else you can show me. Seeing it removed would be ideal but otherwise just seeing as much of it as possible in one shot should suffice.

As for the handle itself, you can very likely reuse it once you remove it from the worm gear. It's probably still in good condition.