So I am no expert in 425 Savages, but was this a common thing? As we all know there was a 30-30 Win (rimmed) and a 30 Remington (rimless).

Some very early model 8 Remingtons were stamped 30-30 Rem and 25-35 Rem and soon after changed to 30 Rem and 25 Rem to avoid confusion with the rimmed Winchester calibers. The early Remingtons stamped 30-30 Rem and 25-35 Rem bring a premium price. (kind of like the "30 Sav" stamp in our world"

Is this also the case with 425's?

Don't know.....

"You cannot invade mainland America. There would be a rifle behind every blade of grass"
~Admiral Yamamoto~

When the people fear their government, there is tyranny; when the government fears the people, there is liberty. ~Thomas Jefferson~