Newburyport Coke bottle.

[Patenter]

I live on a cove in Lake Winnipesaukee. Back in the 1920's the coal-powered steam boats used to pull onto small coves like ours to dump their slag and trash, so I am often finding things if I dig into the bottom. I uncovered this coke bottle yesterday but it has no date on it. Is there a way to date it from its markings?

 

[CanadianBottles]

Does it not have a date code where the skirt bends inward? I think it's pretty unusual for the later ones to not be dated. Regardless it looks like a 50s-ish one, I think. Not sure on the exact years for the US Cokes but the base design looks like the newer ones.

 

[East_Tn_Bottle_Guy]