TONOBOS Historic Blood Pressure Gauge with Wooden Case – Wiesbaden

Historic TONOBOS instrument, described by the seller as an early blood pressure gauge (sphygmomanometer) by P.A. Stoss, Wiesbaden. Its large round dial with black and red scales and the folding presentation mechanism of the wooden case give this instrument a distinctive appearance. A characterful collectible from the history of medical measuring instruments.

Offered as a historic, sculptural design object for a desk, display cabinet or collection, with visible age-related patina. The cuff is missing. This is not a complete blood pressure measuring system and is not offered for medical measurements or diagnosis.

• Name on the dial: TONOBOS
• Name on the dial: P.A. Stoss, Wiesbaden
• Date according to the seller: circa 1925; the exact year of manufacture has not been independently confirmed
• Dual scales with markings for cm H₂O and mm Hg
• D.R.G.M. marking on the dial; the number 9480 supplied by the seller cannot be reliably confirmed from the photographs and is not presented here as a verified patent number
• Round metal housing with pointer and protective glass
• Wooden case with two catches and a folding instrument presentation mechanism
• Without cuff; completeness of any other required accessories has not been confirmed
• Stated weight: 508 grams
• Stated dimensions: 14 × 14 × 6 cm

Condition and operation: Tested and working according to the seller. The nature and extent of the test have not been specified. Not calibrated; measurement accuracy and suitability for functional use have not been independently checked. The instrument is offered solely as a historic collectible and display object. The wooden case has visible scratches, wear, localised damage and a visible crack/opening along an edge. The metal housing and fittings show signs of use and discolouration; the dial also shows signs of age. The folding mechanism is visible in the photographs, but operation of the hinges and catches has not been independently checked. The photographs form an integral part of the condition description. Supplied as pictured and described, without cuff.

Display: The contrasting scales, long pointer and folding wooden case make this a distinctive desk or cabinet piece for enthusiasts of historic instruments and mechanical design. Rarity and museum quality have not been independently established.

Shipping: Careful protective packaging is important for the dial, glass and wooden case. A specific express carrier, worldwide availability, fixed shipping price or delivery within three days is not guaranteed.

Tracked shipping is charged separately.