Extremely heavy solid brass cased steam temperature gauge with nut and fibre sealing washer. Comprising milk glass scale and thermometer sandwiched between 2 glass windows, front and rear. The whole is encased in a very robust brass case. Would have been used for measuring the temperature of super-heated steam up to 1000 degrees Fahrenheit.
Condition: excellent, appears unused, small chip in rear glass, see photos. Whilst you're here, why not take a look at the other items in my shop!