Goerz Gold DOT Dagor 9 1/2 " (240mm) f/6.8 in Copal #3 shutter. Serial #840686. Made in USA. Covers  8x10, 5x7 and 4x5 with movements. Shutter speed range is 1/125 - 1 second, and B and T. Front filter diameter is about 46mm and rear filter diameter is about 46mm. Weight 11 oz. Lens is about 2 inches long. Require 3x3" or larger lens board. Lens stop range is f/6.8 - f/45. Single coated glass. Lens is in Ex/Ex- or 7.5/8 of 10 cosmetic condition. Clean glass. No separation. A few small scratches on the front element. One slightly larger, but still small scratch below the #8 in the serial number(see photos). These small scratches on the front should not affect your photos. Good working shutter. Smooth and clean shutter and aperture blades. This shutter was CLA'D in 2023. Original retaining ring. Will work on 4x5, 5x7 and 8x10 field and view cameras, like: Deardorff, Sinar, Cambo, Arca-Swiss, Toyo, Wista, Linhof, Wisner, Zone-VI, Shen-Hao, Ebony and others. Great "telephoto" lens.  Fantastic "Classic" US made lens with good coverage for your 4x5, 5x7, or 8x10 large format camera. Original retaining ring & front cap. Sells AS-IS with NO RESERVE at price of $845. I have LOT more Goerz Artar and Dagor Lenses, Zeiss Dagors, vintage Prothars,  Large Format cameras, lenses and accessories, Kodak Ektar lenses, Portrait and Soft Focus Lenses. More great buys on my other auctions, eBay Store and Web Page