A contractor from Waterford NJ says:
September 9, 2015
Broken window lock. It's the part to the top fixed window and has a number 2 on it. Flush inside mount
Tom from SWISCO responded:
September 11, 2015
Start by looking at our 90-282 and let me know if this can match. Just make sure the screw hole spacing will be accommodated on your window.