While the engine and overall layout stayed essentially the same, the specifications steadily evolved over these thirty or so years.

1934 - Burman 4-speed foot-change gearbox introduced 1935 - Deeply finned sump and improved lubrication.

[2] The 1935 Model 100 was the machine on which Miss Florence Blenkiron and Miss Teresa Wallach undertook the epic journey from London to Cape Town, crossing the Sahara: the first such journey on a motorcycle combination.

[3] 1937 - New fully chromed fuel tank with red and black lined cream panels and snarling Panther logo.

This was the last year of the "Redwing" Model 100[2] 1938 - Kidney-shaped rocker cover introduced.

Redwing designation dropped 1939 - Miller Dynamag replaces BTH magneto.

Heavy duty, sidecar trail Panther forks.