Mid-Century Modern Japanese Porcelain Egg Cups

A pair of Mid-Century Modern double-sided ceramic egg cups, likely produced in Japan during the 1950s or 1960s. One piece features a matte black 'satin' exterior glaze, while the other displays a glossy olive green or harvest gold glaze. Both items are constructed from white porcelain with a high-gloss white interior glaze. These cups are designed with a pedestal hourglass or chalice shape, allowing them to be utilized from either end, potentially to accommodate eggs of different sizes (e.g., chicken vs. duck) or simply as a stylistic reversible choice. The matte black cup retains a rectangular foil label on the inner rim of the base, which reads 'ATC JAPAN', suggesting the distributor or manufacturer. In terms of condition, the pieces show evidence of use including minor surface scuffs on the matte finish and light shelf wear on the footed rims, but they appear free of major chips, cracks, or crazing. The craftsmanship reflects the clean, minimalist aesthetic characteristic of Japanese export porcelain from the post-war era, emphasizing functional geometry and contrasting textures between the exterior and interior surfaces.