Temperature guage, horizontal thermometer, white enamelled face. Nos 30 - 160 along scale bar.
'Patent no 300 ?? Negretti & Zambra instrument makers to Her Majesty, London' printed on the backing plate (on the front surface).
Mounted on a backing of wood, which has arched (rounded) ends. Two small eyelets along top edge would alllow thermometer to be hung horozontally.
Maker: Negretti & Zambra.
