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A giant early 20th-Century American display model slide rule
Details
A giant early 20th-Century American display model slide rule
by KEUFFEL & ESSER CO. N.Y. PAT. JUNE 5.'00 DEC. 22.'08 MADE IN U.S.A. MODEL 101, fully functioning with CF, DF, CIF, C and D scales, mounted on a display board on a stained wooden frame with castors, along with a Slide Rule Manual-Log Log Trig/No. N4080 by Lyman M. Kells, Willis F. Kern and James R. Bland
73½ x 96 in. (186.7 x 243.8 cm.) on stand
by KEUFFEL & ESSER CO. N.Y. PAT. JUNE 5.'00 DEC. 22.'08 MADE IN U.S.A. MODEL 101, fully functioning with CF, DF, CIF, C and D scales, mounted on a display board on a stained wooden frame with castors, along with a Slide Rule Manual-Log Log Trig/No. N4080 by Lyman M. Kells, Willis F. Kern and James R. Bland
73½ x 96 in. (186.7 x 243.8 cm.) on stand