Seeing as it's Peugeot-week, I suppose it's as good a time as any to post this question to the specialists :
what would have been the real difference between the '79 PX10 and PS(N)10 frames, they seem both to be constructed with 531 frametubes AND forks :

https://home.wanadoo.nl/peugeotshow/

Also, what about value difference?

Thanks!

The 1979 PS10 frame is the same as the PX10 frame except that it does not use Reynolds 531 for the stays. Sorry, I don't have prices, as the PS10 was not available in the US in 1979. By the time it became availbale in the US in the early 1980s, it used Super Vitus tubing.

Thanks T-Mar. That '3 tubes renforcés'-decal should have rung a bell here of course! Guess that makes it a PRN10(or PKN10) with 531 fork then

So, does this mean mine is all 531? I figured it's a relative question, not trying to hijack.

That sticker means that it's all butted 531. It's hard for me to believe that sticker is original, though. My PX10 is only a couple of years older and wasn't sold until 1976 and my stickers are in terrible condition. I've always babied the bike and stored it indoors. Maybe I waxed it too much.

It has fork decals to match. The bike is pretty clean overall. I mean, look at the shifter covers! Too bad the ideale 2001 is ripped in a couple of places. I just took it on the first ride, and it's very nice. Geez, I love this bike. The guy at the bike shop asked me what the black cotton wrap was going on, and I told him. He said, "Don't do anything to it, take a couple of pictures and put it on ebay!" I said, "Nahhh I think I'll keep it.",,,,BD

You can't get unused 531 decals unless you're a builder, right?