Thats very cool. Simple and yet ingenius ingenuity and historic technology. Pretty smart system really. The pictures are very cool as well.
You found ice cream as well. Thats exciting. I love ice cream. The photo looks like a sort of ice cream artwork piece. Nice one!
Ha ha ! Don't you love an ice cream pic!
I was very impressed with the series of locks, can't wait to share the video when I get round to edit it.