It's hard to say what you have without seeing a clear picture of the whole operator. Check out our 39-095, 39-146, and 39-151 and see if any of these are a match.
A home owner from MOOSIC PA says:
April 3, 2014
THE WINDOW IS 38 INCHES WIDE. IM ATTACHING PHOTOS AS REQUESTED
MY REFERENCE NUMBER IS D37236
THANX CELL IS 570-499-6539
Tom from SWISCO responded:
April 3, 2014
Thank you for the new pictures. Please look at our 39-390 and 39-389 and see if either of these are a match.