F.20 Data Sheet 20

C-Thru, PS-79, c.1970

Serial Number or Date Stamp:

Country: USA Primary construction material: pl Case included?: no

Length of 1 decade = 16 in, and overall scale length = 16 in. The largest physical dimension is 6 in.

Front Scales: ReproSize [ OrigSize ] PercReduc NumReducs

Back Scales:

Notes: Proportional Scale, from the estate of Johnny Craig, noted comic book artist

References: https://americanhistory.si.edu/collections/search/object/nmah_1756887

Date Acquired: 06/11/2022