Tiffany & Co Sterling Silver Screw Key Ring Unk Authentic

Continued 925 Sterling Silver Tiffany & Company large sized key ring holder with screw ball end for easy access to key removal and insertion.
Many of these marked Tiffany & Co and made of solid sterling but are not authentic. This one looks good but unknown if actually authentic.
Marked, tested and Guaranteed solid sterling silver.
Size is 1 5/8″ North to South by 1 9/16″ wide across. Sterling thickness is 1/8″. Very strong and well made.
Weight is heavy at 23.7 grams.
The screw turns easily and stays in place.
Has some nicks and dings from prior use.