A rare and visually striking vintage Japanese round enamel advertising sign for 日かバッテリー (Nichika Battery). The design features a bold circular composition with a vivid red central emblem set against a white field, overlaid with deep blue katakana lettering reading バッテリー (Battery). The strong geometric logo and high-contrast color scheme are emblematic of mid-century Japanese industrial branding, designed for maximum visibility from a distance. Its round format distinguishes it from standard rectangular kanban, making it particularly desirable for collectors and interior display. The symmetrical layout and dynamic emblem create a powerful visual presence, ideal for wall display in vintage-themed spaces, garages, or curated industrial interiors. This piece is double-sided, originally intended for hanging or projecting from storefronts, increasing both its rarity and display versatility. The surface shows authentic aging—rust along the edges, enamel wear, scratches, stains, and patina—giving it a strong historical character and collector appeal. ⸻ Estimated Period Likely Showa period, circa 1950s–1970s ⸻ Size Diameter approx. 45 cm ⸻ Condition Vintage used condition. Visible enamel loss, rust, scratches, stains, and edge wear consistent with age. Mounting holes present. Please review all images carefully as they form part of the description. ⸻ Collector Appeal * Japanese enamel signage (kanban) * Automotive / battery industry history * Showa-era industrial design * Rare round double-sided sign format * Strong graphic décor piece ⸻ Popular Keywords Japan, Japanese, enamel, sign, signage, kanban, vintage, retro, Showa, battery, automotive, industrial, advertising, metal, collectible, round, logo, shop, display, antique, decor ⸻