Hancock Blow Off Valves 1943 Industrial Advertising Calendar Card Valves
$ 13.2
Description
Hancock Blow Off Valves 1943 Industrial Advertising Calendar Card Valves. Vintage industrial advertising calendar card for Hancock Blow-Off Valves produced by the Hancock Valve Division of Manning Maxwell & Moore Inc of Bridgeport Connecticut, featuring a detailed cutaway illustration of a blow off valve identified as Fig 8634 alongside descriptive promotional text highlighting Blo-Deflector seats and discs for durability and wear resistance, with an integrated October 1943 calendar block printed in magenta, showing light age toning and minor surface marks consistent with age while the reverse is plain, making this a desirable piece of World War II era industrial advertising ephemera appealing to valve boiler railroad power plant and mechanical history collectors. P268
