i took a quick look through the archives but did not turn up anything on this....
....is there such a thing as a 1E stem? could this have been an OEM part? i've got what looks like a plain 1R with a "1E" cast into the quill portion. It also has a slightly different bar clamp bolt - the bolt is accessed from the front of the stem and the nut is open all the way through and not chromed. there is also no logo on the front of the bar clamp (i can't remember if the 1R has one or not). the only logo is a winged c "cinelli" stamped on top of the forward extension.
any help would be appreciated,