left hand arm crank

Hello,

Unfortunately, I can't determine with certainty what the correct replacement for your operator would be with the original still installed but I can give you a place to start. I've related a few of our operators with similar hole spacing and orientation to the one shown in your photos. Go through and see how the dimensions compare to yours. The opposite-handed versions of these operators can be found under the related items section on each product page. Thank you!