What is the connection between a Greeves Challenger complete with a knobbly scrambling tyre on the front, and a young lad of 16 who was to go on to become one of the world's top motorcycle racers?
The answer: Tom Herron in his first ever race.
Speaking in 1975, Tom recalled that historic and somewhat amusing occasion.
"When I was 16, I was scrambling an old Greeves and having some good times at weekends and I heard of a road-race that was being run locally. I thought I'd have a go at that, it looked easy enough, so off I went to the circuit with my Greeves and filled in an entry form.
I qualified for the race by putting ticks on a form in the race office and then put my helmet on and got on my bike, the same Greeves Challenger I was scrambling on. I was clueless!
I knew there was a difference between scramblers and road racers, so I put an 18-inch racing pattern tyre on the rear wheel - the front one still had a 21-inch trials knobbly on it - but I did put a bit of air in it!!
Well, we got away in the race on that old airfield and halfway round my pal Eddie Farmer fell off and I stopped as soon as I could - the brakes were terrible things - and I ran back to him just lying there on the ground, not moving. I thought he was dead!!
There was no-one around, I think the marshalls had gone for a snifter, so I fired the old Greeves up and charged over the infield to fetch an ambulance.
Of course he was nowhere near dead, he'd just knocked himself out - we laughed about that for a long while after."