There are 4 grooves for cigarettes and the base is marked "California Pottery" and a number that's hard to read, but it might be 409.
1960s Maurice California Mid Century Modern Green Drip Glaze Ashtray Greek Key
Vtg Mid Century Modern Brown Drip Glaze 2-pc Pottery Planter w/ Saucer
MCM California Pottery Orange Volcano Lava Drip Glaze Ashtray Snuffer Design
Calif USA Ashtray California Pottery MCM Drip Glaze Yellow Red Ceramic 6.75" L
SOMBRERO ASHTRAY Treasure Craft Pottery Orange Lava Glaze Trinket California!
Vintage Hanging Owl Ashtray Orange Drip Glaze Tall MCM
