Its really nothing special i sure most of us have held one that had that but just did not notice because its such a common bottle it was most a mold defect or when the glass cold it set wrong.
it is a Brady brothers from new york its probably one of the most common colored strap sides with embossing but still is probably worth around 20 dollars.
Its is definitely no an American and there something about the seal that makes me think it is a repro from the picture you cant tell if there is any ware.
The winans bros is most definitely the hardest bottle to get there. I'm from the area those came from and the almost never turn up i have on with a full label and i picked up a box a few years later.
Yea on some of the labeled ones it has that some are plan and there is one different embossing i cant remember what it is off the top of my head. a long time me and my dad have been chasing them for many years over 20 years its up to now but you never come across them at shows or any where.
You got yourself to straight sided cokes the thing with these is that you need to be from the area to know if there are rare but you see a 1000 regular ones before you see straight side ones i have never dug one and i have been digging for around 11 years now.
Colored Turtles
Turtles Dug behind a school in mass it took 76 of them to make that.
Different Moore labels
Different Labeled turtles.
Different shapes.
Colored Masters.
Labeled masters.
A magnetic oil and bluing and rare med all made by John...