F.25 Data Sheet MJS-p-0076

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Boykin, RotaRule Model 510, 1965

Serial Number or Date Stamp:

Country: USA

Primary construction material: pl

Case included?: yes

General Description: Advanced spiral log-log trig/decitrig duplex slide rule

Length of 1 decade = 50 in, and overall scale length = 50 in. The largest physical dimension is 6 in.

Front Scales: K A D [ C CI CF S CS ST T CT B L ]

Back Scales: D50 DLL V2 [ V1 C50 LL3 LL2 LL1 LL01 LL02 LL03 ]

Notes: Original box, case, instruction book, ads – all the papers; 1 of only about 200 produced

References: http://osgalleries.org/os/fulldetails.cgi?match=52; http://osgalleries.org/journal/pdf_files/18.1/V18.1P39.pdf

Date Acquired: 08/01/2020