TR6 Fuel consumption

[Paul Mitchell <paul-m@mweb.co.za>]

There is a fuel consumption meter in my 74 TR6, positioned in front of
the gearstick. Its scale goes from poor to good, through normal (I
think), although the needle never makes it out of the poor end of
normal.

Was this standard equipment, and how does it work?

Paul
74 TR6 CR6233O