[amatecha]

RE: finding what "1 can" or "1 bar" was, you may be able to scour archive.org for scans of old magazines and newspapers to see advertisements or product listings for the respective product? At least, that's one route I'd consider

[eesmith]

In 1981, the Betty Crocker Supreme Fudge Brownie Mix included a 5.5 oz can of Hershey's syrup. In 1949 you could get a 5 oz can when you purchase 2 quarts of ice cream. https://archive.org/details/mansfield-news-journal-1949-08-1...

It came in multiple sizes. 5 oz is probably the "small can" mentioned at https://archive.org/details/trinity-parish-of-newton-centre/... .

There was also a 16 oz can, https://archive.org/details/escanaba-daily-press-1964-12-10/... and https://archive.org/details/childrenasconsum0000mcne/page/11... and https://archive.org/details/The_Times_News_Idaho_Newspaper_1... and https://archive.org/details/cupl_004738/mode/2up?q=%22can+of... .

And an 8 pound can (!) for food services. https://archive.org/details/foodloversguidet0000harr_d5o7/pa...

[account42]

So what you're saying is that it's probably 8 pounds, right?

[amatecha]

wow haha, nice finds! that's awesome.