Electric water gauge as standard on the centre binnacle Mini. Marked "C-N-H" Genuine Smiths. For post 1964 vehicles with voltage stabiliser fitted on speedo.
The early type had 3 connector tabs on one long brass strip for wires where as this later type has only 2 separate wire tags on back.
The early type also had 2 fixing screw threads in its back for locating whereas the later type has only one centre fixing threads.