The units for sale are reproductions of a Columbia Eveready #6 A dry cell for radio service use introduced in 1929 by the National Carbon Company (NCC).  NCC marketed the first #6 dry cell in 1896 on the Columbia label, and was the sole source of this product for uses in home, farms, the auto industry, and telephone companies in the early 1900s.

The units are configured to produce 1.5V each with two D-Cell battery holders (wired in parallel), featuring top entry access for easy replacement of the batteries (not included) when necessary.  The tops are potted with epoxy which is similar in appearance to pitch used in the original production.  Cell dimensions (6-1/2”H X 2-5/8” Dia.), weight (2 lbs. w/D-Cells), label colors and graphics, screw terminal hardware, and cap enclosed bottom are consistent with the original dry cell.