Artifact Details Title PAA Circular slide rule Catalog Number 102690949 Type Physical object Description The object is a circular side rule for determining the time of various cities around the world. Printer on the back of the object is "CLIPPER TRAVEL GIVES YOU TIME; PAN AMERICAN WORLD AIRWAYS' CLIPPERS FLY ON BULOVA TIME". Manufacturer PAN AMERICAN WORLD AIRLINES Dimensions overall: 1/8 in x 4 1/8 in x 4 1/8 in Category Pre-computer/slide rule