THE ISBELL UNIVERSAL CONCENTRATOR MEANS A MILL WITHOUT CLASSIFICATION
Los Angeles: Isbell Mining Machinery Co., circa 1920. First Edition. Broadside, halftone illustration of the machine, scant text. 10.5" x 8.25" Very Good. Item #038359
Capacity: 50 to 100 tons of ore per day. [Unrecorded by OCLC.].
Price: $25.00
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