Two nice stems, NOT REPROS, from back in the day:
230397359737
230397357181
Masi Panto'd stem and Colnago panto'd stem. These are my auctions.
The Cinelli/Colnago stem in particular is rather unusual. I've never seen another like it, probably not made in large quantities.
Charles Andrews Los Angeles
"everyone has elites; the important thing is to change them from time to time."
--Joseph Schumpeter, via Simon Johnson