Stührling Original Skeleton Automatic Watch – Black & Rose Gold Tone Stührling Original automatic watch in good working order. The black skeleton dial has rose-gold-tone Roman numerals, and you can see the mechanical movement through the front and the clear case back. Black stainless steel case with a Stührling-branded black leather strap. The case back is marked CAL. ST-90050 and 20 jewels. Pre-owned, with some creasing on the strap as shown in the photos. Watch only, with no box or booklet.