It was made by Shelburne Stoneware, likely in the USA during the 1960s-70s.
Vintage 70's/80’s Mahon Made Stoneware Ugly Face Stoneware Ashtray Brown/White
Vintage Data Accessories Co Ceramic Mid Century Ashtray Early CA Computing
Vintage Stoneware Ashtray Bird & Floral Glaze 5.75" Tabletop Pottery Unbranded
VTG MCM Stoneware Ashtray Floral Flowers Daisies 5” Round+3 clear ashtrays
Vintage OMC Otagiri- Glazed Pottery Stoneware Ashtray, Japan 5” Width
Clay Stoneware Ashtray Green Teal Drip Glaze Arts & Crafts
