purchased as refurbished Team Gan Corsa. Whilst cleaning and preparing to touch up paint, I noticed the E 3380 number and decided to fully restore to a Professional model. Whilst stripping paint, I noticed the Reynolds stamping on tubes. Weighing in at 1800kg, I suspected 531SL which was confirmed by Reynolds expert. (not 753 as the frame was brass not silver brazed). You can see where the original cable guides had been removed from the top of bb. Having recently discovered a "9"stamped on the steering column and a Columbus dove stamp, I suspect the forks are not original. The seat tube measures 57.5 ctc and 55.5 ctc top tube.