Strange soda bottle. "1620", emerald green, textured.

[Oldtimer]

The title of this thread says it all.

Un-mistakeable as a soda bottle. Emerald green. Textured, (corn?) embossed with
1
6
2
0

Like I typed it ^......Has "registered" and "Contents 6 fld oz.", has a tri-angle with an R in it on bottom.

Any ideas?
I suspect it is something to do with the pilgrims landing and the "thanksgiving"...thus the 1620 and the corn texturing...?

 

[ronvae2]

myinsulators.com lists an R in a triangle as: Reed Glass Co., Rochester, N.Y. 1927-1956.