F.278 Data Sheet 278

Sillcocks-Miller, M1 Slide Rule No. 547, 1942

Serial Number or Date Stamp:

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

Length of 1 decade = 31 in, and overall scale length = 31 in. The largest physical dimension is 12 in.

Front Scales: D E B C

Back Scales:

Notes: Military ballistic slide rule; angles in mils (800 mils = 45 deg); designed by Robert Crichlow

References: JOS V14.2p63

Date Acquired: 10/13/2022