Historical information

W&G 476 "Dual-Face" Trigonometrical (Stadia) Made in Melbourne, Australia by White & Gillespie Record Processing Co. a precision engineering firm.
Front Scale
LL (or LL3), L, A [ B, Reciprocal (or CI), C ] D, Cu, LL (or LL2)
Back Scale
Stadia V, H, Chord, A [ B, SIN<6 COS>5, SIN>5 COS <6, C ] D, TAN 30-6, COT 84-90, TAN 5-45, COT 85-45
Conventional Cursor
This type of sliding scale was used to design Battleships during WWII. A subsidiary was W&G Records an Australian recording company that operated from the early 1950s to the 1970s. It released many significant recordings by Australian popular artists of the 1960s and also issued recordings of popular American artists, notably releases from ABC-Paramount (Ampar) label, which W&G distributed from 1955 until 1960, when the Australian distribution was taken over by Festival Records.

Physical description

A Trigonometrical sliding scale rule in its original box

Inscriptions & markings

W & G / DUALFACE / TRIGONOMETRICAL / SLIDE RULE / MODEL 476