Going through the old boxes, I found a stem marked "GUID" on both sides of the extension, marking heavily recessed into the extension. Reminiscent of Pivos of the late 60's or so, though I think it's more cleanly executed. Rather handsome. Loose in an Italian steerer, so I assume that it's French-sized.
Can anyone tell me anything about it? Common? Unusual?
Thanks,
Peter Bridge
DenCO