A Monodex 2inch Taper Measuring Gauge.Ref:DSCFO060.
Made c1950's,patented by Patentools of Brighton this top quality tool has been out of production for some time.
Used to measure and identify tapers in the Morse,Brown and Sharpe and Jarno systems.
Mint condition,technical details in picture below,but also readily available on the internet,Machinery's Handbook etc.
Price £60. Contact me for any info needed.