It bears similarities in style to series like Alexa and Air that are in the 1979 catalogue. According to one book I have, Alexa was already available in the 1960s, so the design of your candlestick might also be of that period. Stylistically, IMO it doesn't fit the designs of the 80s and later, so I'd say probably 60s or 70s at the latest as a design period (which doesn't mean it wasn't produced later than that). In my book no designer is mentioned for the Alexa and/or the Air series.
It says that in that period, a number of designers worked in Atelier Peill+ Putzlers who were influenced by the German designer Wagenfeld (for instance in the sense that goblet shaped wine glasses became more smooth and uncut)