How many models of zippo annual machines are there?

Zippo has 12000 annual machines. Once a year, Zippo20 18 12000 limited annual machine, the first annual machine stand-alone version of C92 black chrome wire drawing midnight chrome printing. Zippo60 60th Anniversary C92 Limited Edition 3000 Final Edition C92 Extension, Large Chrome Mirror 60th Anniversary Stamp as the Machine of the Year, General Omar Bradley. There is also a rare version of C94, which is very rare. This model is only issued in Europe, limited to 25 pieces, packed in a large wooden box with silver-plated bottom and gold inside.