The Alcedo Micron is much more famous, achieving cult-like status among ultralight enthusiasts. They were quite expensive and collectable for a while. Once eBay came along, people realized there were more of them out there than previously thought. The prices have come down but a clean can still fetch $80-200, depending on condition and if the box or papers are included. It's a tiny reel, about 500 size and very light. It was well ahead of its time in the 50s, at least on the weight front.
A ported brass main gear, beautifully cut spiral pinion and a bearing on the rotor, make this reel very smooth and fun to use.
The Great Tradition of Italian Fishing Reel