Hello! So this one has me puzzled... what would this have been used for? Half of the lip is indented on one side & flush on the other, hand stippled, 5" tall, & so far Owens-Illinois, Alton IN, 1935 or 1945 to my best guess.
Definitely not an anomaly, I've never seen anything like it though. It's not a pour spout is it? I'm wondering if it's part of some laboratory equipment or something.