Adjustable rocker identification?!

The middle one in this picture is a Crane ductile iron rocker, looks just like the ones currently on my 340.

CF959A6B-2435-428C-8F9A-97A390FAF742.jpeg


I'm pretty sure the one on the left is a factory 273 rocker that's just had the adjuster swapped out, doesn't even look like they spot-faced the rocker for the lock nut either. Just swapped in a different adjuster.