Turboshaft Engine LHTEC T800 Vintage Lapel Pin Tie Tack rotary helicopters u31

I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. cuff links: none. tie tack/bar: 0.78" x 0.59 (approx. 3/4" x 5/8" or 19.5mm x 15mm). collar bar: none. I always try to point out any clear blemishes and condition.