Courtenay boost gauge

[Graeme]

Courtenay sport boost gauge, near perfect condition, matches later nova clocks, can be seen here on the right £50 posted recorded
http://i295.photobucket.com/albums/mm146/saloondicko/28D3A7D2-D2A8-4994-8016-A9F77E8DE92C-269-000000A819B160CF_zps497d3d43.jpg