-40%
Boiler Efficiency & BTU cost calculator 1950 Graphic Calculator Co Chicago /case
Boiler Efficiency & BTU cost calculator 1950 Graphic Calculator Co Chicago /case
Boiler Efficiency & BTU cost calculator 1950 Graphic Calculator Co Chicago /case

Boiler Efficiency & BTU cost calculator 1950 Graphic Calculator Co Chicago /case

$ 1.52

Availability: 86 in stock
  • Country/Region of Manufacture: United States
  • Time Period Manufactured: 1930-Now
  • Condition: aged, nice shape

    Description

    BTU cost estimate calculator for GAS, coal and oil,  also Boiler Efficiency Calculator