Pickett 550-T - WAKCO Weight Rule No 1373-ET Greg's Slide Rules




Model No

Pickett 550-T - WAKCO Weight Rule No 1373-ET - Notes

  1. The front of this rule has a regular set of scales.
  2. The reverse features a set of scales which appears to allow the user to calculate the weight of variously sized and shaped pieces of different types of metal, including, Lead, Copper, Brass, Steel, Cast Iron, Aluminium and Magnesium.
  3. Unusually for a Pickett rule the Model number is not where it normally is at the left end of the slide on the same side as the Pickett logo. On this rule the model number is in the normal position but on the rear.
  4. Copyright on the rule is attributed to Warren-Knight Co. Philadelphia. There is still a company of a similar name in Philadelphia making and supplying instruments. Unfortunately there is no reference to slide rules at all on their web site.


Further details about this Slide Rule:

Brand Pickett
Model 550-T - WAKCO Weight Rule No 1373-ET
Country of Manufacture USA
Scales Front L, A, DF [CF, CIF, T, S, C] D, DI, K
Scales Back Thickness [Width, Length, Material, Shape] Weight
Number of Scales 17
Slide Rule Materials Aluminium
Cursor Materials Metal/Plastic with metal screws
Cursor Lines 1 Front, 1 Back
Scale Length 25 cm
Length 30.7 cm
Width 3.8 cm
Condition Good
Documentation None
Accessories None

Last updated: 2002-11-16 22:00 AEST
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