National boilers, radiators, and specialties: catalog no26 . Lock Shield Valve 65 NATIONAL HEATING SPECIALTIES Novus Siphon Air and Vacuum Valve.

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Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1920, booksubjectsteambo, bookyear1920