A handy person from dallas texas says:
January 26, 2014
need a window balancer. the stamp says 32 5 hn Caldwell. what is the difference between a series 380 and 385 ?looks like both are the same as seen in pictures.
Tom from SWISCO responded:
January 27, 2014
There is only one difference between these two Series, and that is their bottom shoe. The Series 380 uses the 15-005 while the Series 385 uses the 15-004. I can't quite tell what you have based on your pictures, though. Please carefully compare their dimensions to your own hardware and see which is a better match.