On offer is a rare and historically significant vintage thermograph manufactured by Negretti & Zambra of London, one of Britain’s most prestigious scientific instrument makers. This analog recording thermometer dates to the mid-20th century and remains in very good vintage condition, with its original components, mechanism, and data drum all intact.

This thermograph is built around a mechanical recording system, which charts temperature fluctuations over time onto a rotating cylindrical graph. The internal label confirms a measurement range of 0 to 100°F, and the unit was made in England, with Serial No. R/28172 and Chart No. 5M/9999 FX. It is housed in a durable black metal case with two viewing windows and a hinged access door, and features the original brass badge reading:

Negretti & Zambra – London – Trade Mark

Founded in the 1850s, Negretti & Zambra were official instrument makers to Queen Victoria and later supplied precision instruments to the British Admiralty, the Meteorological Office, and academic institutions worldwide. Their instruments are highly collectible and respected for their scientific accuracy and superior build quality.

This example includes its original internal drum, chart paper, bimetallic coil, and stylus. It measures approximately 10 inches in length and is a fascinating piece of mechanical engineering, ideal for display or further study.

📌 Key Features:
✅ Authentic vintage Negretti & Zambra thermograph
✅ Made in England – Mid-20th century
✅ Mechanical chart recorder for temperature – Range: 0–100°F
✅ Serial No. R/28172 – Chart No. 5M/9999 FX
✅ Original maker’s plaque – “Negretti & Zambra, London”
✅ Heavy-duty metal case with glass viewing panel
✅ Fully intact internal mechanism and data drum
✅ Approximate length: 10 inches
✅ Good vintage condition with age-appropriate wear

🎯 Perfect For:
✔️ Collectors of scientific or meteorological instruments
✔️ Industrial design and engineering enthusiasts
✔️ Museum display or educational use
✔️ Atmospheric studies and historical reference
✔️ An excellent conversation piece or vintage decor item

This is a seldom-seen example of precision analog instrumentation from one of the UK’s finest makers. Negretti & Zambra pieces are widely sought after for their quality, craftsmanship, and significance in scientific history.

🌍 We ship worldwide – Postage will vary by destination and service level. You’ll be shown the total shipping cost before confirming your purchase, so there are no surprises at checkout.

📌 Own a working piece of British scientific heritage – rare, collectible, and mechanically fascinating. Don’t miss this opportunity to add a genuine Negretti & Zambra thermograph to your collection!

stock code 060525