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This slide rule was manufactured in Santa Barbara, Calif. USA Rule material is aluminum - cursor is a plastic Nylon with metal screws. This model rule was used by the crew of Apollo 13, in April 1970. Includes original leather clip on sheath with pull tabfor easy removal out of the case. Scales Front: LL1, LL01, A, [B, ST, T, S, C], D, DI, K Scales Back; LL2, LL02, DF, [CF, Ln, L, CI, C], D, LL3, LL03 Scale Length: 12.5 cm Length: 15.3 cm Width: 2.8 cm Includes two original instruction booklets: "how to use Ln-L SCALE SLIDE RULES" "how to use LOG LOG SLIDE RULES" Actual pictures of slide rule Price $89.00
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