Dating sanitary cans
The final tiny symbol after the "A" indicates the calendar year in which the printed sheet of beer cans was made. Breweries might buy a large lot of cans then fill them later.
The "A" may stand for "American Can" but this has not been confirmed.
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Antique Bottles of Baltimore: collection contains bottles from the 1790s onward.Unless otherwise indicated, the descriptive information presented with the cans in this collection came from Jim Rock's notes and published works.