Penholder Reservoir Stewart Original Patent Lithograph 1888
Penholder Reservoir Stewart Original Patent Lithograph 1888

Penholder Reservoir Stewart Original Patent Lithograph 1888


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DESCRIPTION:

On this original linen-backed lithograph from 1888, W. W. Stewart patented The reservoir is entirely closed when in use except for one or two capillary ducts passing along or through the feed-bar, and means are provided for regulating and controlling the supply of ink and inflow of air.