The pontil. Looks pretty good to me, but I am only now getting interested in flasks, and am suspicious of this one. Thanks for any guidance, advised reading, and help.
Your bottle is authenic.The two indicators that standout-1st The initials A R S This was the location in Philadelphia where the bottle was made.
2nd The type of rough pontil is only seen on the original of this bottle.The Clevenger made version of this bottle does not have the A R S initial's
and has a small raised dot for a pontil.This bottle was made at the Keystone glass works in Philadelphia owned by Adam Smith.One of the glassblowers was
Adam R. Samuels he was the blower and mold designer of your bottle.The bottles chart identification in Mckearin's book (American Bottles and Flasks and Their Ancestory) is the GIV-42.Congradulations you have picked up a nice bottle.The bottles worth in mint condition 250 to 300.
Thank you very much for the info! It is a beauty, and I am glad to have bought it. My first foray into flasks. I collect, and am always looking to buy, bottles from a small coal-mining town named Tamaqua, Pennsylvania. Let me know if anyone has any for sale. Have a great weekend!