Brendan, great Cobb photo! The postcard is cool but it is not from 1915 unfortunately. There are examples out there with postmarks from before Ruth played so there is no way he is in the picture. I could not tell if you were joking but this has come up before and I prefer more folks understand what it is (an awesome early Red Sox postcard but no chance of Ruth).
I wish you would have told me that before I bought it
But great info. Thank you!