Does anyone know the approximate date that the Model 52 magazine followers changed from a folded sheet steel one to a polymer one ? I have each type and am trying to figure which may have been original to a 1990 gun.
Thanks

Not sure of the date but the correct mag for 1990 would be the plastic follower.

I'm also sure that it was a universal transition for any mags that previously had metal followers, like the model 41, which was said to be about, 1985.