Nice looking bike! I love the Nervex lugs... I have an early 70's PX-10 as well but no Nervex. Are you sure about the year? With the Nervex lugs I'd have thought it was earlier than '74. Miamijim and Stronglight are the experts on that, though, so I'll leave it to them. I can also tell you that many many people substituted the original rims on these bikes, so having clinchers doesn't necessarily mean they're original (which is OK, IMHO). Mine has Super Champion rims laced to New Star hubs, for example, rather than the Normandy Luxe Competition hubs that would have originally been on it. I can't see your hubs. Are these the Luxe Competition gold labels (distinguished by having integrated aluminum dust covers)? Or red labels (having red plastic dust covers and high, but not as high, flanges)?

I'm sure you'll love this bike!

Karl