Raymor along with Rosenthal Netter were primary importers of Bitossi pottery, into the US in the 1950's and 1960's. A original Rosenthal Netter will have their label on the bottom, with an embossed Italy mark.
Bitossi is having a resurgence, and some items can still be found relatively inexpensively, on Ebay. The Bitossi animal figurines are becoming more of a collectors item.
These candlesticks were found at a garage sale in the Spring. They are in perfect condition and fit in beautifully, with my mid-century theme.