A Weller pottery various glaze test bowl. The interior and exterior of the bowl are divided into four sections; image credit on full record.
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Weller Pottery; Bowl, Reticulated Rim, Test Glaze (4) Various Colors, 11 inch.
A Weller [pottery, various] glaze test bowl. The interior and exterior of the bowl are divided into four sections, each with a different color glaze. ... [more detail available via subscription]