Hi Roy,
I'm not entirely sure about this one. I've seen these bottles before in France, but never marked 'Sabino' before. The design isn't shown in Decelle's Sabino Catalogue Raisonne, nor in the current online catalogue, but that said, there is still the very slight possibility that these bottles were made by Sabino some time after 1961 as a special commission. More likely, however, is that someone has added the engraved mark at a later date to deceive...
Looking at the stopper in particular, the mould quality is not what I'd expect from Sabino.
Steven