Here is an odd set of calipers or dividers. They have a vernier on the bars and can be used to adjust the scale from one end to another, I think. Found them in my dads tool box. I have no use for them

 

*** LOTSA LOTS *** IN TONIGHTS AUCTIONS!! TAKE A LOOK AT MY OTHER LISTINGS -- YOU MAY BE SURPRISED! AUCTIONING: A LOT OF 3 MAGNIFYING GLASS. THE FIRST ONE HAS A YELLOW BAKELITE HANDLE AND IS MARKED AO

 

LOT 25+ DRUG REP INK PENS,THESE ARE ALL BRAND NEW...QUESTIONS PLEASE ASK,THANK YOU!

 

RHese are WWI vintage. They measure about 4-1/4 inches long when closed, front to back. They are marked "Busch Prisma-Bonocle D.R.G.M. No141636" also the number "7528" is stamped intoo the frame. The

 

~ PICKETT N3-T POWER LOG EXPONENTIAL SLIDE RULE ~ Offered here is an estate-found, vintage Pickett slide rule. The slide rule is in excellent condition and appears to have seen light use. There is a b

 

ENGLISH BAROMETERS OF 1680-1860 HCDJ-FIRST EDITION 1968 BY: NICHOLAS GOODISON A History of Domestic Barometers and Their Makers. Contains 353 pages and is in very good to excellent condition other tha

 

PRECISION PANTOGRAPH by BOYNE, INC, CLEVELAND, OH New in Original Box with Instructions & graphite points 25 Different Ratios to enlarge or reduce any drawing precisely 21" long calibrated aluminu

 

smartcNa Store FOUR UNIQUE SLIDE RULES Navigational, Legible, 2 x Log Log All celluloid on wood, all have printed tables on the backs. "Legible" and "Log Log" are very clean, both have tables under th

 

Vintage German Enbeeco Opisometer Map Measure & Compass This is a fine piece of vintage navigational equipment made by esteemed German company Enbeeco. On one side is a compass which is marked wit

 

1938 Treatment in General Practice by Harry Beckman MD , Publisher: W. B. Saunders Company, 787 pp. Worn and faded cover, faded spine, The back hinge is crack, pages Light soiling ,Page Edges toned wi