Nice bottle. It is hard to say if it was a defect or a repair and use. I know that in the 50s, when I grew up, Coke Bottles were returned for a deposit and used over and over. That was a source of income for me. 2 cents each, 5 cents for big ones. If one was chipped without the risk of injury or compromising the product it would probably get re-used and worn from the recycling process. Yours is older, I believe 1900 to 1915, and I think they were returned back then too. Someone with more bottle knowledge here will shed more light on it.