Very Rare Brass » uniflow https://veryrarebrass.com Sun, 05 Jul 2026 16:10:04 +0000 en-US hourly 1 https://wordpress.org/?v=4.1.1 Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box https://veryrarebrass.com/very-rare-antique-uniflow-steam-engine-pressure-scale-brass-instrument-in-box/ https://veryrarebrass.com/very-rare-antique-uniflow-steam-engine-pressure-scale-brass-instrument-in-box/#comments Sun, 05 Jul 2026 16:10:04 +0000 https://veryrarebrass.com/very-rare-antique-uniflow-steam-engine-pressure-scale-brass-instrument-in-box/
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box

Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
Exceptional antique steam engine pressure scale indicator used for testing and calibrating Uniflow steam engines – an advanced, high-efficiency design used in early 20th-century power plants and marine applications. This precision instrument was used to measure cylinder pressures during the compression (COMM) and expansion (EXPN) phases of the steam cycle. Complete and beautifully preserved, it remains housed in its original dovetailed hardwood case with brass hardware and custom-fitted compartments. Original Uniflow steam engine pressure scale instrument, c. Heavy solid brass and steel construction. Precision-engraved semi-circular scale, marked COMM (compression) and EXPN (expansion) in 1/16? Increments. 0242-326 stamped inside lid. Fully fitted hardwood case with dovetailed corners and brass hinges/latches. All components present and neatly secured in original recesses. Includes original 1973 Richard A. Superb condition throughout – well cared for and complete. Brass retains rich patina with crisp scale markings. Threads, rods, and fittings move smoothly. Hinges, finger joints, and brass latches tight and functional. Case interior clean and intact, showing quality joinery and original finish. Instrument length (assembled): approx. 16 × 6 1/2 × 3 inches. An exceptional, display-worthy example of early industrial instrumentation. Ideal for collectors of steam engines, Uniflow technology, or precision scientific instruments. Thank you for looking.
Very Rare Antique Uniflow Steam Engine Pressure Scale Brass Instrument in Box
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