WWII RAF RPM Gauge 6A/778 MK.IVB Dated 1940. Battle of Britain era
Here we have a 1940 dated RPM Gauge MK IVB or correctly referred to as an Electric Rev Indicator.
Encased in a slim metal body usually referred to as the Smith's body this unit has a stores reference 6A/778. Rated to 5,000 feet and used in conjunction with the MK.IV Generator.
Dated 1940 Battle of Britain era piece.
The instrument would need to be inspected by a suitably qualified person before been considered for flight use.
Postage quoted is for UK post only.
A nice early RPM gauge.