gapco sliding window roller assembly
A handy person from WILKES BARRE PA says:
March 15, 2016
series 408 HS-c25 MST12054 THESE ARE IN OUR 28 YEAR OLD HOTEL these marking were on the window frame.
Tom from SWISCO responded:
March 16, 2016
Is there any way you can show us a few pictures of the roller itself removed from the window? I am not able to identify it based on that number. Thanks!