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In page Cash register:

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A leading designer, builder, manufacturer, seller and exporter of cash registers from the 1950s until the 1970s was London-based (and later Brighton-based[9]) Gross Cash Registers Ltd.,[10][11] founded by brothers Sam and Henry Gross. Their cash registers were particularly popular around the time of decimalisation in Britain in early 1971, Henry having designed one of the few known models of cash register which could switch currencies from £sd to £p so that retailers could easily change from one to the other on or after Decimal Day. Sweda also had decimal-ready registers where the retailer used a special key on Decimal Day for the conversion.[citation needed]