Apparently: ''This movement was made by A Michel SA of Grenchen. The date of founding is not known. The earliest document seems to be a patent taken out in 1916 for a winding mechanism. In 1925 A Michel SA joined Ébauches SA, an association of 26 ébauche makers, including Fontainemelon, A. Schild, ETA (at the time the movement division of Eterna), and a number of other Swiss ébauche makers.'' Information from http://www.vintagewatchstraps.com/movements.php Trench Watch apparently A Michel Cal 220 manually wound movement, working fine keeping good time Enamel white dial with yellow arabic indexes with, matching cathedral hands, sub seconds Silver 0,925 cushion case, and case back, movement signed Swiss Made Fixed Lugs Measurements Diameter excluding winding crown: 34mm Length including lugs: 40mm Depth to centre of crystal: 9mm Lug gauge/strap width: 22mm Goes with a Blue and white new NATO strap Ships in register mail with tracking (3-5days)