- Source: Tias
Ungemach Pottery planter. Here is a gloss white UPCO planter. It is marked UPCO 295 USA on the bottom. It has no chips or cracks, just a little rough around the interior rim edge and one bit of clay waste on the bottom interior. (it is a dark spot but this is not a chip). It measures 7 1/2 inches long by 4 inches wide.