U. S. Navy Nautical Slide Rule, Mark 1, Mod 0

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Country of manufacture: USA,            Date of manufacture: ____
Diameter: 19.2 cm on a 20 X 20 cm square backplate,      Weight: 132.4 gms
Materials: plastic disks on heavy laminated plastic/cardboard back
Cursors: no cursor
Scales: 4, specialized
Front: Nautical Miles/Yards [ Time (Mins, Secs, Hours ] [ Speed ]
Back: blank
Condition: C4 (Minimal signs of use)
Came with: nothing

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