If unsure about what the liprimor finish of a bottle is, check the Bottle Morphology sub-page. Read the questions - and accompanying explanations and exceptions - very carefully as the correct answer is critical to moving properly through the "key. If necessary, look very closely at the bottle shoulder - the best location to see vertical side seams on mouth-blown and most machine-made bottles - in good light with a hand lens to see if there is at least some faint evidence of where the mold edges came together. For example, some bottle types which were intended to be kept indefinitely like the early 20th century barber bottle pictured to the right were produced with the use of pontil rods leaving telltale pontil scars on bottles into at least the early 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". This made it easy to identify their bottles at stores and bottle exchanges.
Although there are examples of bottles having mold seams that fit these date ranges properly, the issue of dating bottles is vastly more complicated than the simple reading of side mold seams.
The History Of Milk Bottles And What To Look For
Lori's Blog Dr. The reason this is noted here is that the concept keeps popping up in the literature of bottle dating and identification ranging from Sellari's books Sellari For instance, round bottomed bottles with tall sides were made prior to and most square bottomed bottles with short sides were made after See FAQ The three questions found on this page below answer several basic questions about a given bottle. About this site. Newman's key made a noble attempt at simplifying bottle dating, but is weakened by the fact that the subject is much too complex to be conducive to such a simple approach by itself.