Below are the indicators used in 17 different models of Milwaukee Visible Pumps. Real photos would be more helpful but I've got to work with what I've got.
I am not positive that the real photo of the indicator identified as a 58-A is correct. DB provided it to me. He said the original owner said it came from a Fry Roman Column who thought it was an original setup. However after looking at original sales literature, I could not find any Fry indicators that looked like it, but did notice this very close resemblance to the Milwaukee 58-A.
As always any help that you can provide will be appreciated.