Spout isn't original as this was a ketchup, called a baseball ketchup because of the stitching around the bottle edges. Turn of the century age wise and sometimes, but not always, can bring $40 on E-Bay...
For what it is worth from 1891 to 1911, the official spelling of the city's name was temporarily changed to Pittsburg. Don't know how that impacts Heinz bottles.
Yes , that is the baseball stiched Heinz. THe spout isnt original.
It contained Tomato Ketchup (not catsup). It would have had a tin screw cap.
They were apparently sold right after 1900.
I dont think Heinz played the Pittsburgh vs. Pittsburg game.