There seem to be loads of slightly different versions of this one, both in tune and lyrics ! The one I learned years ago from a book bought from the EFDSS, I think, had the German clockmender coming to England, and being called Benjamin Snooker and meeting the young lady in Finsbury Square. It had one final verse, which doesn't seem to appear in the other versions here:

So come all you young fellows, take a warning by me
If the German clockmender you chance for to see,
Take hold of your lassie as firm as a rock,
If you leave her behind, he'll be winding her clock
With his tooraliay, his tooraliay etc. etc.

- jeanie