Swank Black Glass Vintage Tie Tack, Brutalist Tie Pin

Tie tack has a nice rectangle design with black glass cab on the front. 

• Size: 1/2" long.
• Type: Pre Owned Mid Century Vintage from the 1960's. 
• Condition: Great vintage condition with good working clutch back.
• Materials: Silver tone plated metal, glass.
• Markings: Marked Swank on the back.