F.407 Data Sheet MJS-p-0449

SIC, 1580, 1961

Serial Number or Date Stamp:

Country: JPN Primary construction material: bb Case included?: yes

General Description: Advanced linear log-log trig/decitrig vector/hyperbolic duplex slide rule

Length of 1 decade = 10 in, and overall scale length = 10 in. The largest physical dimension is 10 in.

Front Scales: Sh2 Sh1 Th A [ BI S T CI C ] D LL3 LL2 LL1

Back Scales: X2 X1 P2 P1 [ Q Y L Lx I ] I Lth1 Lth2 LY

Notes: Vector Electro Hyper-Vector Log-Log slide rule, by Scientific Instruments Co.; special scales using P/Q set, including evaluation of hyperbolic functions given complex variable coordinates; same as Relay 158

References: https://sliderulemuseum.com/Manuals/SIC_1580_Instructions_ScanByJodieHobson.pdf

Date Acquired: 11/02/2026