1. W & G made slide rules in Australia from about the start of WWII through to the 1960's and possibly early 1970's.
2. This model rule was a basic rule with some additional scales/guage points for electrical problems.
3. Ron Manley has another example of this rule with illustrations of usage of some of the specialist electrical scales.

Brand	W & G - White and Gillespie
Model	Model 432 - Dualface Comprehensive
Country of Manufacture	Australia
Date of Manufacture	after WWII
Scales Front	LL(LL1), L, A [B, Reciprocal(CI), C] D, Cu(K), LL(LL2)
Scales Back	Sine, Kw(A) [HP(B) & Temp (Farenheit), Tangent] Voltage Drop, Dynamo Efficiency
Number of Scales	16
Slide Rule Materials	Wood/Celluloid
Cursor Materials	Metal/Glass
Cursor Lines	1 Front, 1 Back
Scale Length	25.5 cm
Length	34.9 cm
Width	4.3 cm
Condition	Good
Documentation	This rule came with no documentation but the Slide Rule Manual by BA Simm was written for this model slide rule: A slightly later version of this manual is available for download.
Accessories	Heavy cardboard slip case