The Art Nouveau interior of St Mungo Vintners - with its dark wood, stained glass and brass fittings - remained in storage since the pub closed its doors in 1974.

American antique dealer Mitchell Litt acquired the fittings and shipped them to a warehouse in California.

Designed by architects MacWhannell & Rogerson, it was built in 1904 in the style of the Glasgow School - inspired by architect Charles Rennie Macintosh.

Mitchell said: “I had no idea at that time who Charles Rennie Mackintosh or that school of architecture was, or anything else of that nature.

“What mostly attracted us was the leaded glass windows, there were quite a few throughout the pub.

“It was just basically the art nouveau interior and the way the whole thing looked.”

The interior only resurfaced after Litt’s son contacted a friend, Doug Hirsch, who wanted to create a “speakeasy” for his staff at his Santa Monica medical app company GoodRX.

“I’ve always been in love with English and Scottish pubs,” said Hirsch. “When I was in college I studied abroad in England and of course I spent time in Scotland.”

The pub installation took almost two years from start to finish but Hirsch said his “speakeasy” was now a key part of attracting people to work for the company and bringing staff back into the office.

“Gathering people together in a social environment to get to know each other, especially again in a world of remote learning and people staring at computers, this is sorely needed for us all.”