bottle with seams

[Creek Diver]

This bottle has me confused. It has obvious seams, but has a molded top and, I think, a faint seam that rolls over the top. It does have a mold number, 912, on the side of the bottle near the base. I see no makers mark. Any ideas?

 

[Dogo]

It would be helpful to have some indication of size. If it is small, (about 6"), it may have held CERTA, which is used in making jelly. Those bottles have a ring around them.

 

[Creek Diver]

The bottle is 7.5 " tall and 2.25" in diameter. I'll research that CERTA angle. It seems like my grandmother might have used that for making jam. Thanks!