Manual Skylight Operator
A handy person from Philadelphia, PA says:
April 18, 2015
the gear is worn and won't open all the way anymore, we need a replacement
Dave from SWISCO responded:
April 20, 2015
We do carry the 39-379 skylight operator, but I'm not sure if it will work for your window. Take a look at it and see if you think it's a possibility.