I have the feeling that the answer to this question should be obvious,
unfortunately, I don't know it.
Is the embossed phrase "WARRENTED FLASK" on a colorless glass flask
temporally diagnostic? The flasks (there are a few dozen) have mold
seams which would lead me to believe they date from the very late 19th
century or early 20th century.
Thanks in advance for your help.
Rich Veit