1. Early pocket version of a Trig rule from Pickett.
2. For later versions of this rule refer to N200-ES and N200-T.

Brand	Pickett
Model	200
Country of Manufacture	USA
Scales Front	K, A [B, CI, C] D, L
Scales Back	[S, ST, T]
Number of Scales	10
Slide Rule Materials	Aluminium
Cursor Materials	Metal/Plastic with Metal Screws
Cursor Lines	1 Front, 1 Rear
Scale Length	12.5 cm
Length	15.3 cm
Width	2.8 cm
Condition	Good, slight case markings on reverse
Documentation	None
Accessories	Leather pocket case