Dennis Scott used to work in the fire service in Aberdeen.
And he was there when his employers changed their name from the North Eastern Fire Brigade to the Grampian Fire Brigade in the 1970s.
Nowadays, he is retired, but anybody who thinks he has forgotten his roots should think again.
You see, Dennis didn't just sit back when he learned that one of the old silver engines was about to be sold off for scrap in 1985.
Instead, he took possession of the classic vehicle, pledged to keep it in pristine condition, and, 30 years later, he has been true to his word.
Indeed, Dennis' machine is the only one left in Aberdeen or Aberdeenshire. And look at how well it has been preserved.
It hasn't happened by accident, either. Dennis and his fellow enthusiasts are genuinely in thrall to these wonderful old machines.
He told STV: "There used to be 11 of these engines operating in the late 1950s and 1960s, and I always thought they looked wonderful.
"When I heard this one might end up as scrap, I just thought: 'No, I have to stop that happening'
"Ever since, it has been housed in the country in Aberdeen and my friends and I have done our best to keep this vehicle - and others - in as good condition as we can.
"It's a labour of love, between respraying it, and finding the old decals, and keeping it clean, and preserving the silver. But it's worth it.
"I drove it to the wedding of one of my colleague's children in Banchory last September and you should have seen people's faces."
One of Dennis' confreres has worked tirelessly on the red fire engine pictured above.
It actually dates back to the 1940s and yet, such is the care and attention to detail displayed by these fellows, you would never guess it.
And the north-east public will get the chance to enjoy these vehicles when they appear at an event organised by the Scottish Vintage Vehicle Federation at Milton of Crathes in Banchory next month.
As Dennis said: "Life moves on, but there was an elegance about these old engines. If you worked as a firefighter, you gradually fell in love with them.
"I always get a bit of a thrill when I go down to the garage and see it again. And that is even after 30 years."
If genius is an infinite capacity for taking pains, this fellow is a transport Einstein.