Black and White Swirl Art Glass Bowl

This is a hand-blown art glass shallow bowl or centerpiece platter featuring a striking monochromatic swirl pattern. The design consists of alternating black and clear (translucent) glass canes spiraling outwards from a central point at the base to the outer edge, creating a dynamic visual pinwheel effect. The bowl has a wide, flared rim with a slightly irregular, undulating edge, which is characteristic of freeform hand-blown glass rather than machine-molded pieces. The material appears to be a heavy-weight sodium-calcium or lead crystal glass. In terms of condition, the glass retains a high gloss, though a price sticker is visible on the surface, which may leave adhesive residue upon removal. No significant chips, deep cracks, or clouding are immediateley apparent from the image focus. The style suggests a mid-to-late 20th-century influence, potentially inspired by Murano 'mezza filigrana' techniques or Scandinavian modernism. While no specific maker's mark is visible through the glass in this view, the quality of the spiral alignment indicates skilled craftsmanship. The base likely has a polished pontil mark indicative of its hand-finished production.

I have carefully examined the high-resolution images of this monochromatic swirl art glass centerpiece. Technically, the piece demonstrates a 'vasi a spirale' technique, reminiscent of mid-century Murano 'mezza filigrana' styles. The craftsmanship is evident in the precision of the alternating black and clear canes, which maintain consistent spacing as they expand toward the rim. The undulating, freeform edge and heavy material suggest a hand-blown origin rather than mass-produced centrifuge glass. Based on visual inspection, the surface retains its original luster, and the presence of a retail sticker suggests the item has been handled in a secondary market environment; while no immediate cracks are observed, I would need to check for 'flea bites' along the rim and grazing on the base. The current market for decorative glass of this style is stable, though it lacks the high-premium demand of signed pieces by masters like Venini or Barovier & Toso. Comparable unsigned works of similar scale and complexity typically realize prices in the $150 to $250 range at auction or through specialized vintage dealers. The monochromatic aesthetic increases its desirability for modern interior design. Limitations: This appraisal is based solely on digital images. A physical inspection is required to confirm the presence of a polished pontil mark, evaluate the weight (to distinguish between lead crystal and soda-lime glass), and search for a faint acid-etched signature or designer's mark which could triple the value. Provenance documentation or original manufacturer labeling would be necessary to elevate this beyond 'attributed' status to a specific glasshouse or artist.