Aside from the finders, later ones have a plastic grip on the wind lever, which is a little nicer. Also as I recall, somewhere in the history they went to putting the manufacture year in the first two digit's of the S/N. Not sure if the switchover year is documented though.
The meter finders are a bit ungainly, but I'm not sure the "value" of the plain ones matches the reported cost.
If you run into a chrome one with a plain finder and a black name plate, made in circa 1970, it may have been stolen from a house in Thailand 40ish years ago