Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
Infrared Radiation Calculator
Perrygraf CorporationUSA
Card Stock
197612 cm x 25.3 cmInfrared Sensors

Notes: "1) Used for infrared calculations and conversions 2) Designed for use with infrared electronic detectors and components 3) The following companies are listed: Philips, Elcoma and Mullard"

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