Porcelain plate, bearing a maker's mark for Wałbrzych

This ceramic item is a white porcelain dinner plate, photographed from the underside to reveal the maker's stamp and backstamp details. The plate features a classic round shape with a gently scalloped, undulating rim. The material is a smooth, glossy glazed white porcelain of standard commercial dinnerware quality. On the recessed base, several markings are directly visible: a central green underglaze stamp comprising a stylized monogram emblem above the text 'WAŁBRZYCH' and 'MADE IN POLAND', with the number '19' printed underneath. Additionally, there is a small stamped numeral '51' in brown or rust-colored ink located on the outer rim of the foot ring. The piece exhibits a clean overall appearance with no visible chips, cracks, or severe structural damage in the provided photograph, though minor surface scuffs or manufacturing flaws cannot be entirely ruled out without physical handling. The style is consistent with mid-to-late 20th-century mass-produced European porcelain tableware, though no specific production year can be verified from the image alone. The identification of the maker rests entirely on the clearly legible factory backstamp printed on the underside, which remains unauthenticated as to its exact date of production or intended export market.

Based on what I can see in the provided photograph, this ceramic item is a white porcelain dinner plate featuring a classic round shape with a gently scalloped rim and a recessed base bearing markings consistent with production by Wałbrzych in Poland. The green underglaze stamp and associated numerals suggest a mid-to-late 20th-century European commercial tableware origin. I can't verify from a photo whether the mark is fully correct or if minor manufacturing flaws, internal stress fractures, or hidden wear exist. Physical inspection would be needed to confirm the exact condition, glaze integrity, and tactile qualities of the porcelain. The estimated value range of $15-30 reflects typical market behavior for mid-century European utilitarian tableware of this type, assuming the attribution to Wałbrzych is correct. Demand for standard mass-produced vintage porcelain dinnerware remains modest, primarily driven by replacement service matching or casual retro table settings. If the item were to turn out to be a reproduction, an unverified copy, or if the mark is deemed less desirable, the market value would likely drop to the lower single digits as generic dinnerware. To establish a stronger assessment of its status, an in-person examination by a ceramics expert, detailed hallmark verification, and closer inspection of the glaze and paste would be necessary.