This listing is for a vintage Mincer's Axis Register — a small pocket-watch-style optical / optometry instrument with a 0–180-degree scale dial used to measure or "register" the cylindrical-axis orientation of a spectacle lens. Suitable for collectors of vintage optometry / optician instruments, scientific instrument memorabilia, and early-20th-century patented measuring tools.
"Mincer's Axis Register" was a small handheld optometry instrument used by spectacle makers and opticians to determine the axis orientation of cylindrical (astigmatic) lenses. The dial face is graduated in degrees from 0 to 180 along both top and bottom semicircles — the canonical optical-axis convention — with a central pivot for a needle indicator. The dial-face inscription "U.S. AND FOREIGN PATENTS APPLIED FOR" places this example in an early-patent-pending production phase, typical of late-19th-century / early-20th-century optical-instrument manufacture before patents were formally granted and stamped on the device.
Yes — and especially for buyers interested in vintage scientific / optometry instruments rather than pure militaria. The Mincer's Axis Register is a small, displayable, well-marked piece of trade-craft history that anchors a beginner optical-instrument collection at an accessible price point.
What era and origin is this from?
United States, late-19th to early-20th-century optometry instrument manufacture (patent-pending production phase).
How rare is this piece?
Mincer's Axis Registers are scarcer than common pocket-watch-format vintage instruments because the optometry-trade audience was always a niche; well-preserved examples with legible dials are progressively harder to find.
Is this a good item to start a collection with?
Yes — small, displayable, and tied to a specific patented optical-trade tool.
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