Lot 445. Gertrud & Otto Natzler, Hemishperical bowl with very rare black volcanic glaze, Los Angeles, CA, 1960s; Signed NATZLER, label H518; 4" x 6 1/2". Estimate: $5,000 - $7,500. Sale Price: $10,000. © Rago Auction

Note: A rare example in this glaze.

Lot 445. Gertrud & Otto Natzler, Large earthenware bowl, white, cobalt and brown volcanic glaze, Los Angeles, CA, 1960s; Spurious illegible pencil markings, paper label, H958; 6 1/2" x 10". Estimate: $14,000 - $19,000. Unsold. © Rago Auction

Note: A large example with exceptional glaze.