The ARIEL 500cc red hunter has this configuration. But 0 to 100
The ARIEL square four has same configuration. But either 0 to 100 or 0 to 120

I think if you look up the 350cc range it will have same configuration 0 to 80

There bikes used these speedos pre-war. And carried them on post war.

Or it's on a simular bike.

Tony.

Location: Huncote on the pig