The assortment & model numbers on Cookie Monster's tush tag are Assortment #L6566 & Model #L6567.
The M2685 model number is only to distingish the different box shown here with the Elmo keychain.
The Elmo keychain is the same as L6952. althought there is no model number on his tush tag.
Cookie Monster with elmo Keychain
Model # M2685
UPC # 027084572414