Pewter coaster, attributed to International Silver Co.

This physical examination covers a set of metal coasters, specifically showcasing an octagonal form crafted with a raised rim and stepped edge detail. The interior base of the visible coaster features a depressed central well containing a raised bas-relief motif of a stylized American eagle holding a shield, surrounded by a circular arrangement of thirteen stars. The reverse side exhibits a circular hallmark stamp in the center, which reads 'INTERNATIONAL SILVER CO.' along with a monogram containing the letters 'I S'. The metal displays a dull, muted grey finish with a notable amount of surface tarnish, discoloration, scuffing, and minor pitting consistent with vintage or antique pewter or silver-plated items. The overall design leans toward a patriotic or Americana decorative style, commonly associated with mid-20th-century decorative metalware. The attribution in the name rests upon the legible maker's mark stamped on the reverse side of the object, though the authenticity of the mark is unverified. Please note that the owner supplies the context that these are part of a 'set of 6 coasters', an unverified claim from visual inspection alone. The craftsmanship displays clean casting details on the relief work, but condition issues such as uneven patina and surface wear are readily apparent across the base and rim.

Based on the provided image, I have examined a metal coaster featuring an octagonal form and a central bas-relief motif of an American eagle and thirteen stars. The reverse bears a stamp consistent with the International Silver Co. Per the user submission, this piece is part of a set of 6 coasters, though I can only evaluate the single item shown. The metal exhibits significant tarnish, scuffing, and minor pitting consistent with heavy age and use. I must treat the maker attribution as a working hypothesis, as photographs cannot fully capture metal composition or establish the exact origin of a hallmark. The appraisal estimate assumes the owner's claim of a complete set of six is accurate and that the pieces align with mid-20th-century production by International Silver Co. Comparable vintage Americana metalware typically commands modest prices in the secondary market, and the apparent condition issues here place the estimate at the lower end of the spectrum. If the mark is a later addition, or if the remaining five coasters are missing or in worse condition, the market value would be largely negligible. An in-person inspection would be necessary to assess the metal content, evaluate the condition of the complete set, and better understand the origin of the hallmark.