THE MOVEMENT A clean and super accurate running condition Omega Decimal railroad grade movement, 16 size, 19 caliber, open face, 15 jewels, adjusted to temperature and 2 positions, double roller, stem wind, stem set beauty. Serial number of 5376521 dates this watch to 1916, thats 98 years old and still running strong. This excellent Omega movement is in top-notch working order, with a dead flat and true balance wheel motion that has a fine, wide arc and strong, steady beat. The movement is a smooth wind, starts right up on the 5th wind and pendant sets as designed. Appearance wise, this movement is looking great, with no tarnish, no stains or jeweler's marks. The movement was found to have very minor and ordinary wear with no signs of abuse upon inspection and maintenance. This is a truly rare, high grade roaring classic that you will be proud to own.