1. Pickett 5" Trigonometry Rule.
2. This is an older version of the Pickett N1006-ES trigonometry rule. This rule shows the progression from the older style Pickett as used in the Deci-Point and other early format rules to the modern squared off style with Nylon cursor blocks. Refer to the illustration of the shaped cursor block which is reminiscent of the new style cursor without the nylon block. This model also saw a change to the end pieces such that they completely enclosed the stator bars at the end of the rule. This actually makes it hard to move the slider as the end pieces protrude beyond the end of the stators and when the slide is pushed in fully it does not protrude beyond the covers at the other end of the rule and there is effectively nothing to grip.

Brand	Pickett
Model	1006 Trig
Country of Manufacture	USA
Scales Front	K, A [B, ST, T, S, C] D, DI
Scales Back	DF [CF, CIF, CI, C] D, L
Number of Scales	16
Slide Rule Materials	Aluminium
Cursor Materials	Metal/Plastic with metal screws
Cursor Lines	1 Front, 1 Back
Scale Length	12.5 cm
Length	15.7 cm
Width	2.8 cm
Condition	Good
Documentation	None
Accessories	Leather Pocket Case