CCM on-ice style jersey. Everything is sewn on, size 50. Hand-signed twice (Front & Back) by Brian Propp (Philadelphia Flyers).Propp was known for his unique goal celebration dubbed "The Guffaw". After scoring a goal, Propp would skate towards center ice, place his right glove under his left arm and raise his right arm in a waving fashion. While making the gesture, Propp would say, "Guffaw!" Propp credits the celebration to comedian Howie Mandel.During an Atlantic City show in 1986, Mandel used the Guffaw during his comedic routine. Mandel explained a Guffaw was when someone raised their arm and moved it back and forth. Propp adopted "The Guffaw" and it became his signature move, first appearing in the 1986-87 season.The lot / autograph(s) includes an official Beckett Authentication Services serially numbered hologram for authenticity purposes.Authentication: Beckett Hologram