This antique siphon is from the sparklets-boc brand, these siphons were manufactured by the company Sparklets Ltd, London.
Used mainly in the domestic sphere, they had the advantage of hygiene, at a time when there was little confidence in the manipulations that could be carried out in industrial processes or in the places where these bottles could have been.
This one in particular is a refillable siphon made of green aluminium and contains inscriptions on its head and on the base of the bottle.
Head inscription: Sparklets, England
Inscribed on the base of the bottle: Serial no. shuc, Boc, made in England.