would agree with you re the appearance, though in view of the permanent popularity of 'deco style' then almost anything might genuinely be called deco provided, stylistically, it's in the deco style - whether made in the mid 1920s or last year. The company was active from c. 1925 to c. 1975, apparently, and marks can vary - ........... ""Prior to World War II, Sabino glass made for sale in France was marked” Sabino Paris ”. Larger pieces had the signature etched into the base. Smaller pieces had the signature molded into the side. Sabino also used the trademarks “Veart” and “Venox” in the 1930s."" ..... so it gets a bit confusing. I could be very wrong, and someone may look in here who is a world renowned expert on French opalescent glass, but this is generally expensive material and possibly out of the league of most collectors here. The mark shown on this piece appears to be 'intaglio/impressed into', which may help someone to date the bowl. Whilst you're waiting hopefully for some info here, there is plenty to trawl through on the internet. How was this piece sold to you i.e. description and date? Sorry this is really unhelpful, fingers crossed someone might be able to offer information that's actually useful. P.S. ........... and welcome to the GMB by the way.