Breckenridge , A.M; The Polyphase Slide Rule No. N4053
HOBOKEN NJ, KEUFFEL & ESSER CO., 1938 , PAPER BACK
Overall Condition is: GOOD
Front of the paper back is water stained there is pencil marks.the back of the book has water stains and slightly dirty, the last page of the book at the bottom has a piece torn off the front of the book inside cover has previous owner righting on the book at the bottom of the pages are water stained
REF#:083848