1. Pocket Log Log rule.
2. The Pickett 300 is an earlier version of this rule. This later rule is in Pickett eye saver yellow.

Brand	Pickett
Model	300-ES Log Log
Country of Manufacture	USA
Scales Front	LL1, A [B, T, S, C] D, LL2
Scales Back	LL3, DF [CF, CIF, CI, C] D, L
Number of Scales	16
Slide Rule Materials	Aluminium
Cursor Materials	Metal/Nylon/Plastic with Metal Screws
Cursor Lines	1 Front, 1 Back
Scale Length	12.5 cm
Length	15.3 cm
Width	2.8 cm
Condition	Good
Documentation	None
Accessories	Leather Case