1985-87 PZ10's were 531 (with Campagnolo), the former being black (like the one sold), and the latter two being a champagne-type color. The 86-87 PX10's were blue with Mavic components (there is one on Ebay right now). The shop I worked in dropped Peugeot after 1988, and I spent more time sawing aluminum Galaxies in two, swapping them for Triathalons, than I did selling Pugs.

FWIW, I bought an '87 PSN 10 because we could not get the PZ10 in my size. They were on back order from they first day they started taking orders, and I am not sure that they ever showed up in a 58 cm anywhere.