Vintage Operation and Maintenance Manual for the Joy Heavy Duty Stationary Compressor Class WN-112. Softcover. Michigan City, Indiana. The letter that comes with the manual is dated 1957.
The manual measures approximately 8 1/2" x approximately 11 1/4" across the front cover.
It shows general wear, including: some small tears along the edges, creases, and some spots/discoloration.
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Please check out my other listings for more vintage Joy mining manuals. I will combine multiple items for shipment to save you on shipping cost.