70.04 - Star Finder Scales, 1949, by Brownell & Weems, Annapolis, Maryland
The Star Finder scale comes with 7 individual clear plastic scales that fit over the accompanying star chart. Used by pilots in air navigation, the scale has a leather slip-jacket carrying case. Over all measurement ( 8″ diameter). The star chart is folded as issued and is approximately (23.5″ x 23.5′).