Vinyl Casement latch
A contractor from California says:
November 11, 2014
There are 2 patent numbers on this piece -
CDN Pat. 2,142,071
Not sure if those help, this could be a Truth part, but I've had no luck finding it.
Thanks so much for your time!
Donna from SWISCO responded:
November 14, 2014
Thank you for posting. Unfortunately, this window lock has been discontinued and is no longer available. I am sorry we cannot be of more help.
You could possibly consider using an adhesive like crazy glue or gorilla grue to repair the broken part.