I have two pre 64 Model 70 featherweight aluminum buttplates. The one on my known to be original 1953 Model 70 is a bit thinner than the other and the sides are not bright aluminum, they are dark. It is aluminum though or so it seems. The other one is the prototypical aluminum plate with the thicker brighter sides that we see in most pictures. Did these featherweights come with buttplate variations? I know they came with bolt variations as some are not hollowed out, like on my early 53, while later bolt handles were drilled out. Any insight on buttplates appreciated,
