I have a 50th Anniversary Strat from 2004 ... and a 60th Anniversary Strat ..from 2006
the 2004 is the 50th of the Strat, and the 2006 the 60th of the company, Fender.
It's confusing enough in lefty, they only made one lefty version for each year ... but in right handed they made sometimes three different models for each year .. each one costing more $$$
Lots of sellers try to get more for their guitar by saying it is a commerative model but all Fenders from 2006 had some small emblem on them celebrating Fenders 60th.
2004 50th
2006 60th
edit to add .. they never made a lefty commerative Tele model ... but all lefty teles in 2006 had that small emblem on them somewhere