Shopping trusted sites & trusted knife dealers is something we highly recommend to all beginner & intermediate collectors.Thankfully, we have trusted sellers in the AAPK member stores where you can buy with confidence. You will find that most books date this stamp as being used from 1920 to 1940.The Queen Cutlery Company has been manufacturing knives in Titusville Pennsylvania for over 100 years. Both blades are stamped exactly like shown at the top left of the attached pic, but on my knife NEW YORK is all caps. I can upload a pic of the actual knife later if it helps. I'm going to take a guess and say that it's a transitional stamping between the first "New York", and second "NEW YORK".The company opened its factory in 1902 and continues to produce knives in the same way now as they did in their earliest years. Either way, the knife was probably made prior to 1902.
When Shatt and Morgan went into bankruptcy in the late 1920s, Queen City bought the factory and equipment at a sheriff's sale and moved all its operations into the factory in 1933.
Nailing down an exact year might be hard unless you get the opinion of an expert.
David Krauss wrote a book on the history of Queen and Schatt & Morgan in 2002.
Eventually, to defeat the League from the inside Oliver joined the them under the identity Al Sah-him (Arabic: السهم; for Arrow) and after defeating Ra's al Ghul, Oliver retired from vigilantism with Felicity Smoak.
However, he eventually returned to Star City taking up a new codename, Green Arrow, to continue fighting for the people of his city.