Misc-083 Secon Metals Precious Metals Weight Calculator
$6.50Vintage slide rule weight calculator from Secon Metals Corp. New, York. For calulating weight of Gold / Silver / Platinum / Palladium sheet, wire tubing etc. Secon Metals Corp. 228 East 45th Street New York 17, N.Y. From the 1950' - 60's era, Very nice condition with original envelope and instructions. Price includes USA shipping.
