Your search for "Gruul Signet 273" revealed the following:
Gruul Signet (BLC) from Bloomburrow Commander, available at 401 Games Canada. Rarity: Uncommon Finish: Normal Artist: Efrem Palacios Card Text:1, T: Add RG.
Gruul Signet - Dan Frazier is Back: Allied Signets (SLD) from Secret Lair Drop, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Dan Frazier Card Text: Dan Frazier: Allied Signets1, T: Add RG to your mana pool.
CONTENTS 1x Old Frame Azorius Signet 1x Old Frame Dimir Signet 1x Old Frame Gruul Signet 1x Old Frame Rakdos Signet 1x Old Frame Selesnya Signet