1922 Ad Precision Instruments British Thermal Units Gravity Recorder IEC1 XES4 Keywords specific to this image:

Keywords specific to this image: Archeology

Photography by C

maker of Postum Coffee

All-Steel Refrigerator Department

1922 Ad Precision Instruments British Thermal Units Gravity Recorder IEC1 XES4 Keywords specific to this image:This is an original 1922 black and white print ad for the Precision Instrument COmpany, specially featuring the Gravity Recorder and the Recording Calorgraph. CONDITION This 89+ year old Item is rated Very Fine +++. Light aging throughout. No creases. No natural defects. No surface rub. No tears. No water damage. There is some bleed through visible on this this ad. Product Type: Original Print Ad; Black White Grade: Very Fine +++ Dimensions: