These are not all made in Stoddard but they are part of my study. The bottles are Stoddard glass. One very subtle and tricky way of identifying a Stoddard bottle is looking for the word STODDARD on the bottle. This took me years to figure out. Two glass houses in Stoddard are Granite Glass Co. 1846-1862 and New Granite Glass Works 1860-1871. To make things more confusing there was also a The New Hampshire Glass Factory 1814-1855 in Keene, NH not too far away. Some of the Keene bottles have a similar hard to see mold characteristic where the word KEENE is embossed on it. LOL