Click on the image to the right to view both mold seam features pointed out on a press-and-blow machine manufactured milk bottle made by the Pacific Coast Glass Company San Francisco, CA. Notes on embossing, labeling, and existing research Raised embossing and when present, paper labeling on a bottle can frequently provide important details to refine the probable manufacturing date range if information exists for the company that either manufactured the bottle i. This yields a likely date range under this question of between and the mids for non-pontiled bottles like "A". This yields a "YES" answer to Question 2 and we know that this is a machine-made bottle likely dating it no earlier than about
You can find an enormous variation in the sizes, colors and markings of bottles. Utilitarian items makes up the bulk of the bottles produced during the 19th century and first half of the 20th century. Pursue these links freely since they will take a user to more details on bottle dating and identification and hopefully add to the users knowledge and understanding about the bottle being "keying out".