I have a pair of chrome 6-day track bikes that I bought used in Ohio in 1967. The story was that they were custom Cinellis made for a Canadian 6-day team. The bikes are very similar but one has a more relaxed seat tube angle and a longer wheel base. Don't know if any of that is true but I'm skeptical of the Cinelli bit due to the method fo attaching the seat stays. The only identification marks are the serial numbers, 058 and 059. Please have a look at the photos and let me know what you think.