IWC clam latch

Checking with our supplier, they tell us that the IWC sash lock you show in your photo is no longer available. They suggest using the 90-313 sash lock and remounting the holes at the top. You will need to use a screw similar to the 33-011. However, exhibit some caution: you don't want to use too long of a screw or drill too deep. You could damage the frame or the glass in the sash. When in doubt, contact a professional window shop or handyman.

Thanks for reaching out to us. Your handle set is similar design to our 82-009A. This may be what you want, but you should check to ensure that your hole spacing is the same at 4-15/16", center-to-center. That will verify whether or not our part will work on your door.