Dating old bottles can be a fascinating process that involves examining various characteristics and features of the bottle. One common method used by experts is to analyze the location and style of the mold seam on the bottle. The position of the mold seam can provide valuable clues about the age of the bottle.
Prior to 1860, bottles typically had a side mold seam that ended on the shoulder or low on the neck. This means that the seam would start at the base of the bottle and extend upwards, ending somewhere on the shoulder or neck area. This characteristic is often seen in older bottles, and it indicates that the bottle was made using an early manufacturing technique.
Between 1860 and 1880, there was a shift in bottle production methods, resulting in a change in the location of the mold seam. During this period, the seam would end just below the finish of the bottle. The finish refers to the lip or top surface of the bottle. This change in the position of the seam can help narrow down the age of the bottle to this specific time frame.
Moving forward, between 1880 and 1900, another shift occurred in bottle manufacturing techniques. The mold seam began to end within the finish, just below the rim of the bottle. This means that the seam would no longer extend beyond the finish but would stop within it. Bottles showing this characteristic are typically from this specific time period.
For bottles made after 1900, the position of the mold seam alone may not be sufficient to accurately date them. Other factors such as the type of closure (cork, crown cap, screw cap) and the presence of embossing or labeling can provide additional clues about the bottle's age. It is important to consider these factors in conjunction with the location of the mold seam to obtain a more accurate estimate of the bottle's age.
When dating old bottles, it is essential to have a good knowledge of historical bottle manufacturing processes and styles. This can be achieved through research, studying reference materials, and consulting with experienced collectors or experts in the field. It is also worth noting that dating bottles can sometimes be challenging, as there may be variations and exceptions to the general guidelines mentioned above.
In my personal experience as a sommelier and brewer, I have come across various old bottles while exploring wine cellars and breweries. During my interactions with fellow enthusiasts and collectors, I have witnessed the excitement and dedication that goes into dating and identifying these bottles. It is a journey of discovery that involves careful observation, research, and a passion for history.
To summarize, dating old bottles involves assessing the position of the mold seam on the bottle. Bottles made before 1860 have a side mold seam ending on the shoulder or low on the neck. Between 1860 and 1880, the seam ends just below the finish, and between 1880 and 1900, it ends within the finish just below the rim. For bottles made after 1900, additional factors such as closure type and embossing should be considered. However, it is crucial to remember that dating bottles can be complex and may require a combination of knowledge, research, and expert consultation.