Vintage Corning Ware Heartline Casserole Dish

This item is a vintage Corning Ware casserole dish featuring the distinctive 'Heartline' pattern, which consists of a black EKG-style heartbeat line inside a rectangular frame on the side of the vessel. The dish is constructed from white Pyroceram, a glass-ceramic material known for its high thermal shock resistance, allowing it to move directly from freezer to oven. It features a rectangular shape with rounded corners and integrated tab handles on either end for easy gripping. The exterior finish is a bright, opaque white with a smooth, glossy glaze. Based on the silhouette and handle style, this appears to be a 1.5-quart or 2-quart size model, typical of mid-to-late 20th-century production, specifically the late 1980s to early 1990s when this specific medical-themed promotional graphic was popular. The piece displays well with a clean interior, though some minor gray scuffing or 'shelf wear' is visible along the bottom contact points where it has rubbed against other surfaces. There are no visible chips, cracks, or heavy staining in the provided image. The craftsmanship is consistent with mass-produced American kitchenware of the era, emphasizing durability and utility. Detailed manufacturer markings would likely be found embossed on the underside of the handles or the base.