[NorCam]

It is my experience with the original stamping that the beginning and end of the sequence in fonts are normally deeper as the gang stamps were rolled and this left a deeper impression of the first font (left) as well as the last fonts (right). Looking at many originals, you can clearly see the A in amperage and the G in negative come off deeper on the right sides as the stamp rolls off the case. The 7's will normally have a deeper depression at the top right corner of the leg where the vertical and horizontal lines meet and this will normally appear like the leg widens as it rolls through and off the stamping (right along the upper right on the curved leg). Kinda has a squished look to the top of the vertical leg and appears slightly wider in that pocket if you catch what I'm saying.

With all the fakes floating around, I'm off the opposite opinion where any light stamping's I see will always raise a flag for me, and then I'll really analyze the fonts. It also appears the alt in the first picture has the date code misaligned? Look at the K with the lower legs running down low and the 24 being set higher along the lower plain. Looks like an obvious restamp to me and likely one that someone thought was real but sent to Ken to be restored and later sold it.

There are a lot of restamps out there, but most are easy to spot when you really learn what to look for. Even the guy from Ohio that is now rolling stamps onto unstamped cases is having a hard time recreating those original depressions and still uses incorrect fonts. Gotta be sharp to spot the fakes now as some are getting better and will trick many smart people.