CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins76% CONFIDENCEOverall confidence: 76%How well the pin's source and references back up its dates.Weighted average of how firmly 4 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or betterGuinness World Records[1] says the Pulsar P-1 was 'released on 4 April 1972'; Collectors Weekly[3] also gives 4 April 1972, while Wikipedia[2][4] says only 'the spring of 1972'.
Hamilton Watch Company released the Pulsar P1 Time Computer on 4 April 1972, the first all-electronic digital watch, an 18-karat gold LED watch priced at US$2,100.
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