A Clyde puffer

When I was a lad there were hundreds of these vessels sailing up and down the river. They were made famous in the story Para Handy by Neil Munro and became a cult TV series in the 60s.
They were an essential supply line to the Highlands and Islands but now there are only a few left for conservation purposes, this one is at the Maritime Museum at Braehead shopping centre on the south bank of the Clyde
More detail can be found here--
http://www.river-clyde.org.uk/puffers.html