Monday, August 15, 2016

Mint Of The United States At San Francisco Ingots - Part XVI - Unique Examples

Generally reserved for marking the reverse of large plates of silver prior to shearing, the Type III oval hallmark founds its way onto at least two cast ingot obverse surfaces. I recently acquired the example pictured below, #37, which now makes a grand total of two that I have ever seen, both are in my collection.


Not only is the Type III hallmark a rarity, #37 is the lowest of all serial numbers I have ever found on these 25 oz class cast examples. Ingots from this class that I have examined or have good information available, are from a limited number of melts or lot numbers. Lot 1, Lot 2, Lot 164 and Lot 178 have been identified to date. #37 is from Lot 1. 


The photo below shows the difference between the Type II and Type III oval hallmarks.


A photo to show the difference in size between the 25 oz class and the 5 oz class ingots.



And the final photo shows the use of the Type III hallmark on the reverse of a sheared plate example overlaid on #1267.


Silver Ingots
Ken