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F. W. DWYER MFG. Co. SLIDE RULE AIR Velocity Calculator HVAC 1957 VINTAGE Prop
F. W. DWYER MFG. Co. SLIDE RULE AIR Velocity Calculator HVAC 1957 VINTAGE Prop
F. W. DWYER MFG. Co. SLIDE RULE AIR Velocity Calculator HVAC 1957 VINTAGE Prop
F. W. DWYER MFG. Co. SLIDE RULE AIR Velocity Calculator HVAC 1957 VINTAGE Prop
F. W. DWYER MFG. Co. SLIDE RULE AIR Velocity Calculator HVAC 1957 VINTAGE Prop

F. W. DWYER MFG. Co. SLIDE RULE AIR Velocity Calculator HVAC 1957 VINTAGE Prop

$ 6.83

Availability: 42 in stock
  • Model: Air Velocity
  • Material: Plastic And Cardboard
  • Brand: Dwyer
  • Condition: Good condition
  • Manufacture: F.W. Dwyer Mfg. Co.
  • Country/Region of Manufacture: United States
  • Time Period Manufactured: 1930-Now
  • Year: 1957
  • Type: Calculator Slide Scale Rule
  • Modified Item: No

    Description

    This is a Vintage
    1957
    Dwyer Air Velocity Calculator slide scale.  It has a hard plastic outer case and cardboard slide.  It is in excellent condition but, does have some slight yellowing of the cardboard.
    Please review the photos carefully and ask any questions you may have prior to bidding.