You are bidding on
old Vintage USA, wooden KAE CO N.Y. PAT 8.17.13, Slide Rule 27 cm,
A, C, T, CI, D, L1, L2, L3, D, S, C, D, L , 19 date code.
Shipping with tracking number!!!!
Please see the photos for dimensions ( the ruler is in centimeters, 2.54 cm= 1 inch)
Happy bidding!