This vintage, tie clip is very unique! It is an actual, working slide rule. This would be a great gift for an anniversary, birthday, Christmas, wedding, or any other occasion. Size: 2" Condition: The tie metal is in good condition. I think it used to be a darker gold color & has faded a bit over the past 50 years. There is a tiny chip out of the plastic cover on the slider. Maker’s Mark: none This model tie clip is retired & is no longer in production. All jewelry items come in a gift box. #n23 Vintage Slide Rule Tie Clip. Gift For Groomsmen, Groom, Dad, Wedding, Anniversary, Christmas, Birthday, Father’s Day