Just got this, might be my favorite bottle in my collection now. Pictures really don't do it justice. Almost mint condition, a nice early font, great embossing, tons of bubbles, a grooved donuty lip, great color. Somehow this thing isn't pontiled, it must've missed it by a year. I have another M. B. & Co marked 1861, and I've seen other bottles made with this older mold but they're aqua and have a newer looking blob, so I'm guessing this was made around 1855-1857, the aqua version with a slightly newer lip 1857-1861, and the 1861 mark version from 1861 onwards.