As with virtually all of the bottle type categories to follow, liquor bottle diversity is staggeringly complex in depth and variety.
The pictures on this page show just a small bit of this variety.
It is an almost absolute fact that if an American made liquor bottle is mouth-blown it pre-dates National Prohibition.
It is largely true, though not nearly absolute, that if a liquor bottle is machine-made it dates from or after Prohibition.
This embossing was required on all liquor bottles sold in the U. To quote an important work on the subject: "For many observers of American Life the Temperance movement is evidence for an excessive moral perfectionism and an overly legalistic bent to American culture." This is a pervasive thread that still exists in current American politics and culture in aspects of human behavior well beyond just alcohol (Gusfield 1970).
(It should be noted that implementation of this requirement began in late 1934, so some bottles made that year will have the noted embossing.) This regulation was repealed in 1964 giving an effective dating tool of 1935 to the mid 1960s for this diagnostic feature (Munsey 1970).
Be aware however that for some years after 1964 liquor could still be found in bottles with this embossing since not all liquor producers switched immediately to new bottles due to the expense of new molds or to deplete an existing supply of bottles (Ferraro 1966).
Additional links to images of similar bottles are also frequently included.
The array of references used to support the conclusions and estimates found here - including the listed dating ranges - are noted.