Tylan FC-200 Mass Flow Controller MFC, HCL, 100 SCCM, Used, antique

This MFC looks like it has a date code of 1976 making it one of the first mass flow controllers made for production Selling this piece as a antique to be placed in a museum... Tylan  Mass Flow Controller Model FC-200 Gas:  HCL Range:  100 SCCM