Instructions
Check the mold marks on your doll's head. Dolls that were first made in 1961 or 1965 still bear that mold mark today, if the doll is still in production.
Check the information on the doll's box. If you still have the box the doll came in, the box numbers may give you a clue as to when the doll was made. Eight-inch dolls with a "0" prefix -- 0789, for example -- were made in 1973.
Know the eras of Madame Alexander dolls. As of 2011, any dolls made before the 1930s are considered antiques, while dolls made more than 25 years ago but less than 75 years ago are only considered collectibles. Modern dolls are those that were made within the past 25 years, and contemporary dolls are those that are currently in production.
Identify your doll's name. You can crosscheck the name of the doll with the Madame Alexander archives to determine when the doll was in production, thus giving you an idea of when your doll was made.