At the Classic Race Aarhus today I spotted this Jensen Healey, which was the most succesful Jensen of them all, despite its short run from 1972 to 1976. It had a 2.0 litre Lotus engine and this very, very small ashtray.
According to Wikipedia this fine handling car consisted mostly of Vauxhall bits. “Suspension was simple but effective with double wishbone and coil springs at the front, and a live rear axle with trailing arms and coils at the rear. Brakes consisted of discs at the front and drums at the rear. The suspension, steering gear, brakes and rear axle were adapted from the Vauxhall Firenza with the exception of the front brakes which were the widely used Girling Type 14 Calipers.” Girling, a name you could trust.
Among the few clear advantages of open top motoring we find that it is possible to smoke and drive without kippering oneself. The rest of the interior looked like this, something new for me.
And from a fine Danish website, http://www.viaretro.dk we get this image of the exterior…
Driven To Write 
I suspect this is a car industry generic ashtray. I knew I had seen it somewhere else and, for a short while, even wondered if it was the rear ashtray of my Citroen (such is my enthusiasm for ashtrays). But I’ve just looked and that is a very different device. However, the Bristol Beaufighter I drove a few years back had this.