Just wondering, is there anyone who has really high mileage on their 531 framed bike?

My gold/black 531 tubed single speed started it's life out as a who knows what French. When I got it, it had definitely been ridden hard, but still reasonably maintained, had been repainted (not rattlecan) at least once (redecaled as Columbus, too), bottle braze-ons added, a RD hanger brazed on, and the BB rethreaded from French to Italian. So someone before me had spent some time and $ on this frame, and my assumption is that from the condition I got it, ridden it a lot. Miles? No telling.