This is a1889 Webb figure 8 calculator stamped with double patent dates of “Patent Nov. 5 & 12, 1889”.   It is stamped serial number of 4164.   Machine is called the “Webb Variation C by” professional collectors and rarely found.  The calculator was made of steel with nickel plating.  There is some light discoloration and pitting, but machine still operates very well.  Included is metal stylus and not certain if original, but works well with this machine.  Size is 6.5” length x 4.25” wide.  In Thomas Russo’s book on “Antique Office Machines”, this is called the Webb Variation “C” and availability is scarce with a value of over $ 800.00.  It is truly a piece of history from 121+ years ago.