Vintage Raketa Perpetual Calendar Soviet Watch, Blue Dial, Jumbo Case, Made in USSRThis vintage Raketa Perpetual Calendar reflects the practical creativity of late Soviet watchmaking. In traditional watchmaking, a perpetual calendar is a highly complex mechanism that automatically adjusts for different month lengths and leap years. In the case of this vintage Raketa, the term refers to a manually set calendar system. The wearer aligns the printed year scale with the corresponding month and day grid, allowing the watch to function as