This is a vintage Shanghai mechanical wristwatch, likely produced in the 1970s or early 1980s, made by the Shanghai Watch Factory in China. Front View (Dial & Case) • Dial: Striking sunburst blue dial with applied rectangular indices and minimalistic design. • Hands: Orange lollipop seconds hand and sword-style hour and minute hands with lume-filled centers. • Minute Track: Inner chapter ring marked with 5-second intervals in red (10, 20, etc.), typical of mid-century styling. • Case Shape: Tonneau-shaped case, stainless steel with polished and brushed finishes.