A 1928 Chrysler with a "dicky seat" in the boot will be one of the stars of tomorrow's motor show at Hurworth Grange.

A dicky seat, or a rumble seat, pulled out of the boot for a servant or another undeserving passenger – some call them "mother-in-law seats" – to sit in unsheltered from the elements. They were quite common in pre-First World War cars, and continued to be built in to sporty roadsters until the end of the 1930s.

The Chrysler 65 is owned by Tony Gray, of Low Coniscliffe, whose son, Ben, will be behind the wheel tomorrow.

Perhaps it should have been called a Dodge because it was made in a manner to avoid taxes. The more complete a vehicle, the higher percentage of taxation it attracted. So the parts for the Chrysler were made in Detroit in the US but because it was destined for the British market, they were shipped to Canada, within the British Empire, for assembly – but not complete assembly, as it was then shipped "in knockdown form" to Kew in London where it had the finishing touches, like lights and handles, screwed on. This seems to have enabled it to qualify as a UK-made car and not as a foreign import.

"It has a 65hp engine and it was supposed to do 65mph, which was quite fast in those days when an Austin 7 would do up to 40mph," says Tony.

The Chrysler's first owner was a potato merchant based in Cawood, near Selby, who did 82,000 miles in it, travelling the north selling his spuds.

"It was laid up during the war in a shed in a quarry near Richmond, which is where I found it in 1999," says Tony. "Most people would have put it in a skip."

He, though, spent three years restoring it.

"There's a dipstick on the floor, which is the starter," he says. "It has three speeds and a crash gear box so you have to double declutch it, but it drives ok."

Tony has helped organised the Teesside Yesteryear Motor Club rally at the Grange from 10am to 4pm (admission is £2.50). Up to 200 cars and motorcycles – vintage (pre-1930) and classic – will be on show.