Anderson casement sash latch

This is a very, very old lock. They haven't made this in a long time, but if you're handy then you may be able to adapt our 38-057 and 38-056 to work in this application. You'll also need a new 38-135 keeper.

These are modern parts, but they're genuine Andersen. Just keep in mind that they're not designed to work on your window and we can't predict any complications that may arise. Be prepared to get creative.