Heavy “black” glass with no markings

[crkgrl]

Found off Florida Keys. Thought maybe foreign since no markings but same bottle also found in New England. Any ideas? 10.25” tall. About 2.75 across heel. Pretty hefty in weight.

 

[CanadianBottles]

These typically held sparkling wine. They were used pretty widely both in Europe and North America so hard to say for sure where it came from. It's some sort of machine-made bottle, not sure if it's ABM or some type of semi-automatic machine during the transitional period. Almost all of the ones of these that I see are BIM so yours is probably fairly recent, if European maybe 1930s-40s or so and 1910s-20s if American. Could also be Latin American considering where you found it, I don't know much about their glassmaking during that time period.

 

[crkgrl]

Thank you for the help, CB. Happy bottle hunting!