It depends on what he means by "anniversary". There are numerous anniversary models based on different things. There's the 100 year anniversary, the anniversary of he 1894, 1895, 1897, etc. Plus a few other anniversary runs thrown in that Marlin has done. Things like the 1 million anniversary of a 336.
Need more info to determine which one he's referring to.
Marlin lever actions 1870's-WWI, Ballards, and single shot rifles!