Antique 1866 Hayner (Dayton, Ohio) Whiskey Shot Glass

Reads: "Lock Box - Trade Mark Registered - Hayner - Dayton, O. U. S. A." Acid etched design. Applied gold rim. 2-9/16" H. (6.5 cm). Capacity: 1/3 c. (100 ml). Gold worn away in 2 places but in minuscule amounts. Condition: Very good. Please note: 1866 is date company was founded & not necessarily the actual date of this glass, although that may not be an impossibility.