I got this bobblehead and got it signed from the Mariners Team Store un Bellevue WA back in 2008. It doesn't have a certificate as it was in person not a formal signing. Celebrate your Seattle Mariners fandom with this vintage Dave Niehaus Bobble Head. This collectible features the iconic Mariners broadcaster in his element, ready to join your collection of memorabilia. A must-have for any true baseball fan, this Bobble Head is perfect for display in your home or office. Add it to your collection today and show off your love for the Mariners and the sport of baseball.