the bigger ones are rarer and the other colors teal ones were more common but the taller neck and the bigger tooled lip were alot more cruder and i think older as well.. very nice window bottle adn no they wont make you a fortune..
I have done some research on Rumford Chemical Works, because I have one of the smaller green bottles.
The bottles come in emerald green, teal (most common), and cobalt blue (rarest) colors. The most common size is 5 1/2, but also comes in larger (though rarer) 7 1/2" size.
Aside from the different sizes and colors these come in they also have Rumford Chemical Works bottles with the patent date embossed on the bottom of both large and small sizes of bottles.
Also, I searched eBay's Completed Items and saw one of the 5 and 1/2 inch teal blue bottles sell for $13.49. (Teal is the most common of the Rumford bottle colors.)
Hey Treasure... Thanks for that link, it was pretty informative. I have a the smaller one with the short neck and a label (75% anyway). They are very cool bottles and i agree to hang onto them for future increase in value (we hope)