This Calpis double-sided metal print sign from the Showa era is a unique piece of advertising history, reflecting the nostalgic charm of vintage Japanese consumer culture.

Crafted during a time when Calpis was gaining significant popularity in the 20th century, such items are rare, often sought after by collectors who appreciate the aesthetic and historical value of mid-century advertising.

While the visible wear and rust might deter some, it underscores the sign's authenticity and age, which are critical factors for collectors of Showa retro memorabilia.

Given its size and striking visual, this piece commands a price that's consistent with other authentic vintage signage in Japan's collector market.