Hoping to sell these as a set at a local gunshow soon. Would appreciate it if a knowledgable collector (or 2) could please provide a fair market value. I know these are a pair of Colt Contract mags made by Ridson and are WW II vintage. Each has a M1921 DUMMY round (from the Evansville Ordnance Plant) inserted. The pouch is a Russell dated 1918 (hard to see in pic). It's unique feature is the Unit Marking on the inside of the flap, CO. "A" 187th TK. BN. . TK. BN. stands for Tank Battalion. I researched several years ago and had info but have since misplaced it. There was such a unit in the ETO during WW II. I would think the marking would provide some provenance and make it more attractive to an Advanced collector. Thanks in advance for any input !! Best Regards !! Joe