This Ivory rule was made in Newark N.J. by Stephen Jaggers between 1850 and 1860. The hinge plates are a combination of brass and steel.

One of the things that I find most appealing is the graceful scroll-like design of the numerals. They are most certainly hand done and a fine example of scrimshaw work. I know of two other ivory rules by Jaggers, one in the Newark Museum, the other in a private collection and they both are of the same construction and design as this one. I have not seen any others come up for auction or sale anywhere else.