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Colorado Assay Group, Denver, Colorado (126725)

Currency:USD Category:Collectibles / Mining Start Price:120.00 USD Estimated At:240.00 - 500.00 USD
Colorado Assay Group, Denver, Colorado  (126725)
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Lot of three. 1) Von Schulz & Low, Chemists and Assayers billhead. Analysis of Cyanide lot. 1910. 2) Corner advertising cover from Aurum Assay Office, Box 72, Denver, 1721 Champa Street. 1900. Aurum Assay = Gold Assay. rare assayer cover. Sent to WS Wright, Antonito, Colo. Antonito rec'd cancel on back. 3) Colorado Assaying and Refining Company booklet. "Commercial Ores, from Mine to Money. 1907. It lists all of the ores and how to distinguish them and test them. Last 12 pages talks about different assaying processes.

Date: c190-
Country (if not USA):
State: Colorado
City: Denver
Provenance:

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