I found this photo the other day. So I thought to myself......Self, here is a cylinder related contribution I can make to the forum. With all those batteries up on the shelf, they were doing a lot of recording

. With my untrained Edison eye, there seems to be class M's etc....I find it odd that the first case on the left has the look of a late Triumph.
George, I would like to read your take on this line-up.