Porcelain Base with Crown Staffordshire Mark

The item appears to be the bottom or base of a porcelain decorative object, likely a figurine, vase, or lamp base, given the presence of a central hole which often accommodates a lamp fitting or simply serves as a manufacturing vent in hollowware. It is predominantly white, indicative of fine porcelain or bone china. The surface visible is smooth and glazed, exhibiting a slight sheen, which suggests good quality ceramic work. There's a visible green backstamp or maker's mark on the underside, which, although partially obscured, seems to read 'CROWN' or 'ROYAL' with additional text below, including 'STAFFORDSHIRE' and 'ENGLAND', along with 'FINE BONE CHINA'. This mark suggests an origin from a reputable English pottery manufacturer, likely dating to the mid to late 20th century, given the style of the mark. Below the green mark, there is an additional handwritten mark in a reddish-orange hue, possibly an artist's or decorator's initial or a production code, reading 'ch.A' or similar. The rim of the base shows some signs of wear or dirt accumulation, appearing slightly discolored with a brownish hue along the edge, suggesting either age-related patina, handling, or shelf wear. There are no immediate visible chips or cracks from this angle, implying a relatively good state of preservation, aside from surface dirt. The overall construction appears solid and well-fired, typical of quality porcelain manufacturing.