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Ink inscription to the front flyleaf
one reading 'Betjemann's Patent 5481'
and quintessentially English
blue guilloche enamel and cut glass scent / perfume bottle
Aneroid Sphygmomanometer by Down Bros Ltd, London. Circa. 1920 Interiors Ink inscription to the frontAneroid Sphygmomanometer by Down Bros Ltd, London. Circa. 1920. This device was used to measure blood pressure by way of a cuff. This is a lovely early example of a revolutionary portable instrument which enabled an easier and more accurate measuring of blood pressure than the preceding mercurial manometer allowed. The instrument shows some signs of age to the casing but overall remains in a very good condition.
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