Slide Rule, Leather Case, 9 Scales, Electronic Transformers Co.     #127

This is the best quality advertising slide rule I have ever seen, it has a leather slip case.  Advertising rules are usually made from sheet plastic.  This one is made of plastic and metal, it seems to be as good a K&E, Dietzgen or Pickett rule. It is a quality pocket slide rule.  There are a total of 9 scales (a modern Mannheim rule with log & trig scales on the rear) 6 Front Scales K, D, (C, CI, B), A (5th picture); and 3 Rear Scales (T, L, S) (6th picture).  The metal bridges can be adjusted for tension and alignment.  It has Linear, square & cubic conversion equivalents on the rear (6th picture).

Please see text and pictures for a complete description.  I accept returns only if the item is incorrectly described.   Any questions or problems/inconsistencies with this listing, please contact me.

I will be adding more Slide Rules and Similar Items in coming days, If you want me to hold this for possible further auctions and saving with combined shipping,  notify me before paying.