This is The Lightning Calculator and was made in Grand Rapids, Michigan with bottom stamped Dec, 4 1947.  Stylus may not be original, but operates the machine very well.  It operates with all tens, 10s, carry over.  Size is 12” x 2.50”.  More provenance notes are that machine was first made by Bonham & Schram in Chicago.  They changed the name in 1905 to Lightning and 1st machines did not have a base.  This will highlight any collection of 100+ year old calculators.