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.
"It's always darkest right before it goes completely black"
Waste your money! Buy my comic book