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.