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Shown above and below is an ad for the Accoson Calculator Model A, which appears to be similar to the BriCal Model C (see the BriCal page) but with the interesting addition of a ratchet arm on the left side to count up to a 100 £. If you have any information or photos about this calculator, please send me a note. Danke schön to Volker Geppert for providing these images.
Advertisement for the Accoson Calculator For Compound Addition Model A
L .Grigg and Co. 11, Worfield Street, Battersea, London
Popular Science Siftings Magazine 1910 (courtesy V. Geppert)
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