This antique vintage firemen key and miniature tin hat are a must-have for any collector of firefighting and rescue memorabilia. These items came from a collectors estate.  The key (hallow inside) has two 7's and reverse with J. The tin miniature hat is tarnished.  The two items were together in the collection of the fireman's memorabilia.  Unknown origin.  Please message with questions. If you're an active fireman or retired you may know what it was used for.  Thank you for serving.