1. Relay Log Log engineering rule.

Brand	Relay
Model	150
Country of Manufacture	Japan
Scales Front	L, LL1, DF [CF, CIF, CI, C] D, LL3, LL2
Scales Back	LL0, LL00, A [B, K, CI, C] D, S, ST, T
Number of Scales	21
Slide Rule Materials	Bamboo/Celluloid
Cursor Materials	Nylon/Plastic with metal screws
Cursor Lines	1 Front, 1 Back
Scale Length	25 cm
Length	32.2 cm
Width	4 cm
Condition	Good
Documentation	None
Accessories	Leather case