Thanks Bill

Not sure why the Grand Prix got a sleeve at that point. Although maybe it started as a 'Standard' (as per the first 74 catalogue on velo-pages) and they had the Grand Prix name going spare. The sleeve must be a cheaper way of strengthening the middle, going back to Chombi's question. Anyway I think I'm done speculating on these bars. I'm happy with mine, just need to clean them up and use them now!