Considering that Hanno Specials haven't been manufactured for more than 15 years, how many NIB (MKI or MKII) engines are still out there?? Based on what I've read here, seen sold on ebay, and conversations with those who purchased Nelson replacement parts, I'd guess as many as a couple of Hundred (worldwide). I believe OS did not make more than 8,000 total Hanno Specials (6,000 MKI and 2,000 MKII ring and ABC) based on my serial number research.
-Will B.