This is my new find. Coblalt blue bottle, over 13" tall and 5-1/2" in diameter. Partially threaded neck. M in a circle for, I believe Maryland Glass and 2 below it for mold#?. I had find out that Maryland made them from 1920 to 70. I look for similar bottle on the web but cannot find more information.
Last edited by Likethatbea; 08-08-2018 at 12:13 PM.
That dimpled pattern around the base suggests it's fairly recent, probably 1950s at the earliest. Beyond that there isn't much you can tell about a bottle like that. It was probably either something medicinal or some sort of household product.