Help Determining Age of Citrate Magnesia bottle

[Bails]

Hey everyone,

Can anyone help me determine the age of this Citrate Magnesia bottle that I found today? I posted a picture of the full bottle (first picture), close up of the lip and the mold seam to the top of the lip (second picture), an air bubble above the S in Solution (third picture) and the base of the bottle with a B and a 3 (fourth picture). Thanks in advance for the help!

Embossed:

"Solution Citrate Magnesia, Dose adults one half to one bottle as desired, children in proportion to age."

 

[Bails]

Anyone have any info on date?

 

[CanadianBottles]

I'd say 1920s-ish. Machine-made but looks like a fairly early one.

 

[Bails]

Thanks @CanadianBottles! How were you able to determine? Still learning.

 

[CanadianBottles]

Thanks @CanadianBottles! How were you able to determine? Still learning.

It's ABM (automatic bottle machine) because the seam goes to the top of the lip. The very rough suction scar on the base suggests that it's a fairly early bottle though, those were typically a lot less conspicuous by the 1930s or so. 1920s is just a guess. It's possible it could be as early as the 1900s, hard to say for certain.