Oldsmobile-88
Very well known Exeweb poster
Yes...A Ascot RS 12/6 (or 527)Single point water heater.I haven't seen one of these type of things for ages , A sort of stand alone kitchen water heater/boiler. Olds must have worked on these in his time.
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As Spoonz mentioned they were capable of delivering boiling water on the setting lever.
Although they went out of production in the mid 1960s there were still quite a few about until the early 1990s
Stricter ventilation requirements & more awareness about CO poisoning spelt the end of them in domestic propertys.
You will can still see a modern version(Chaffeteux make)in mobile homes & caravans occasionally(they have oxygen depletion cut offs for CO safety)