This included refining facilities in Salt Lake City, Utah, USA, and Brampton, Ontario, Canada. The oval assay mark includes Canada Assay Office in its text. This particular assayers mark identifies these cast silver bars as a product of Johnson Mattheys former refining facility in Brampton, Ontario, Canada. The weight is stamped into the lower-left corner and the assayers mark in the lower-right corner.
#Johnson matthey silver bar serial number lookup serial numbers#
The serial numbers feature one-letter, six-number codes listed vertically down the left side of the bar. The Johnson Matthey pick-and-hammer logo is at the top of the bar inside of a diamond with JM engraved above it.Īlong the top two lines of the diamond are the words Johnson and Matthey. On the obverse side of 1 Kilo Silver Johnson Matthey Bars, there are a number of engravings that identify the basic details of the bar. The result is a rustic silver bar and finished products that have slight variations from one to the next. Rather than relying on computer-aided machines to precisely cut and engrave the silver bars, cast refining relies on the human hand to pour melted silver into prefabricated casts that ensure a desired amount of silver is in the finished product.ĭuring the cooling process, refiners will stamp the markings into the bar to set further as it cools.
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