Karolina porcelain plate (not authenticated)

This object is a round white ceramic dinner plate shown from the underside, resting on a textured gray surface. The physical material appears to be glazed white porcelain featuring a smooth, reflective finish on both the flat well and the sloping rim. The plate displays a classic circular form with a defined foot ring on the bottom. Centered inside the foot ring is a black underglaze maker's mark featuring a stylized crown graphic, script lettering that reads 'Karolina', and the text 'MADE IN POLAND' underneath, with a small number '4' positioned further below. The plate exhibits a clean, glossy appearance with no immediately visible structural damage, chips, cracks, or heavy wear issues evident in this photograph. The style is consistent with mid-to-late 20th-century mass-produced European dinnerware, reflecting utilitarian craftsmanship typical of commercial porcelain factories. The attribution in the name rests directly on the legible maker's stamp printed on the underside, though the piece remains unauthenticated and its exact production date cannot be determined from the visual evidence alone.

Based on what I can see in the photograph, this round white ceramic dinner plate bears a maker's mark on the underside with a stylized crown, script lettering reading 'Karolina', and the text 'MADE IN POLAND', alongside a small number '4'. The physical material appears to be glazed white porcelain with a clean, glossy appearance and a defined foot ring, suggesting a mid-to-late 20th-century piece of European utilitarian dinnerware. However, I cannot verify from a photo whether the visible mark is contemporaneous or if the item is an exact period production, as visible markings alone do not provide a complete basis for a definitive assessment. I would need physical inspection to confirm the porcelain composition, glaze characteristics, and overall condition. Assuming the attribution to the Karolina porcelain factory is correct, comparable mass-produced mid-century European dinner plates of this type typically trade in the $15 to $30 range, reflecting modest collector demand and utilitarian function. If the piece turns out to be a modern reproduction, a generic copy, or unattributed, the market value would likely decrease to nominal household value, around $5 to $10. To establish greater certainty regarding value and attribution, an in-person examination by a ceramics expert, hallmark verification, and physical inspection of the glaze and paste would be necessary.