Crinan FIlm. 

My great grandfather John McCallum was the lockmaster at Adrishaig. I remember visiting him as a child. He refused a M.B.E. because The Beatles got them at the same time lol. My uncle John Fisher also worked on the Crinan Canal.

Thanks for a great video.

Looks like there's only one seal lock at Crinan, at 6 mins and 36 seconds. Great film.