I am not sure of the date of manufacture. I have a Peugeot frame and original fork stamped with the Lion that has a Columbus steerer tube. I did not know that Peugeot ever used any Columbus tubing. Can one of my learned colleagues shed som light on this for me. Would the Columbus steerer be an indicator of tubing used in the frame construction? Unfortunately this frmeset came to me with all braz-ons removed and paint removed. I do not have any information on the decal set to aid me in identification.All help is appreciated.thank you,Happy Trailsjohnstrizeksacramentocaliforniausa