VTG I C.D. Foster I 14K + Diamond Star Tie Tac

This is a vintage 14K gold tie tac by C.D. Foster (aka cdf or cfd) with, according to the box, a genuine diamond surrounded by a star. This item has been warehoused for many years following a store closure, with original price sticker still in box, and would date to the 1980s/1990s. 14K stamp shown in photo 4, measurement photo 5. Shows some tarnish. Pin has wear & looks a tad bent. Box condition, last 2 photos, sticker on bottom indicates stock#136.