Callum says he fell in love with the 40s during his first year of high school.
“I’ve always loved history,” he says.
“When I was younger, I looked at my great grandad’s prisoner-of-war diaries and I just love everything about the period.”
He now collects everything related to the period, such as oil lamps and a vintage record player that he uses to listen to his favourites like Vera Lynn, Anne Shelton and Frank Sinatra.
“I couldn’t tell you a modern singer if you asked me,” he says.
However, Callum told the ‘s Good Morning Scotland programme – via his 1940s Bakelite rotary-dial telephone – that there is one thing from the post-war period he definitely does not do.
“We don’t ration,” he says. “I like my food too much for that.”