IWC window lock/latch U.S> patent no. DES.432900 model SP2203 sliding horizonal or verical.

Hello, thank you for posting,

It would be best to see pictures to confirm, but I believe you may have a lock shown in the past customer thread below. Please review the response for an alternative option! If it differs from the picture, please let me know! 

https://www.swisco.com/discussions/Searching-for-SP2203-77-106366