If You're Interested in Lithographic Printing You Should Read This

[steve B]

In more modern presses the plates were thin enough to wrap around a cylinder.
That cylinder has grippers and adjusters to move and tension the plate.

It looks like this is a system using a tube as a plate, I'll have to look it up to see if it was coated after casting or if they just applied the design straight onto the zinc. It would probably be set up by laying out transfers just as a stone would be.

It also sounds similar to the press Brett Litho had.