Here's a Langley's Bitters I picked up at a flea market in Maine. Nice darker green color. I thought about having it tumbled but decided to put it on hold. Weird defect near base. Looks like the maker stuck a butter knife into it before it cooled. Also a chunk of glass in with the embossing.
Here are my Stresau Bitters bottles from Courtney, Tx. They're not embossed Bitters, but there has been one found with a readable label and they were Bitters. I did not dig these. 3 of them came from a friend that got them from Bill Agee's collection, and the other one I got off ebay. I believe I am the only person that has these 4 different varieties in a collection.