ESTIMATEDDate confidence: ESTIMATEDA target, not a fixed dateHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all ESTIMATED pins59% CONFIDENCEOverall confidence: 59%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 from 50% to 74% confidence
Estimated: only Wikipedia[1] gives 15 November 1928 (as creation and introduction date); Hershey Archives[3] says 'around 1928' and Today I Found Out[4] says 1928 with no day, so the day is flagged as single-sourced.H. B. Reese created and introduced the peanut-butter-filled chocolate cup, first called Penny Cups, on 15 November 1928 per Wikipedia; Hershey archives say it was first introduced around 1928.
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