Note that this device does not utilize logarithmic scales. Made of paper covered turned mahogany, 6 3/8" long overall x 2 1/4" diameter, in 3 sections plus 2 threaded end pieces. There are two columns on the top section, one column on the center section, and three columns on the bottom section. It is one of the earliest examples of a handheld cylindrical calculating device. Also included is a print-on-demand copy of the instruction book.
The calculating cylinder is in very good condition for its age. Slight wear to scales but readable. International Buyers - Please Note. We do not mark merchandise values below value or mark items as "gifts" - US and International government regulations prohibit such behavior.
Please do not ask me to reveal any Reserve prices. This item is in the category "Collectibles\Science & Medicine (1930-Now)\Engineering\Slide Rules".The seller is "ddigalbo" and is located in this country: US. This item can be shipped worldwide.