Vintage M. H. Mear & Co. Huddersfield Comprehensive Conversion Calculator used by Neptune Measurements Ltd. Oldham. The conversion disc measures 147mm in diameter & is in excellent condition. Both front & rear conversion sliders rotate firmly & smoothly. Disc Comes in original plastic wallet which has some minor markings, see photos.

Conversions can be made on the following parameters:

Viscosity

Density

Length

Area

Volume

Flow

Velocity

Power & Heat

Pressure & Stress

Force

Weight

Thermal Conductance

Temperature

Torque

Dispatch using Evri (The New Hermes) or collection in person.

Payment via PayPal please