We'll need a link. Lower level models are commonly identified as the PX model. The frame should be largely braze on free at that vintage, maybe a cable stop on the drive side stay.
At a minimum, a 1968 will have Simplex dropouts and fancy Nervex lugs.
I have never seen an all chrome PX, and at that vintage (or earlier) I've only seen them in blue and white. Aftermarket "modifications" are possible.
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