Dating antiques made in
Produced during the era where all bottles were an relatively rare and cherished commodity to be discarded only when broken (i.e., the first third of the 19th century back many centuries prior) and does not otherwise fit the above two categories.
As Berge (1980) noted in referring to bottles, the "..of manufacture of glass containers provides observable attributes which seem to be very useful in a classification of these artifacts." Thus, this page.We can always have some indication of a starting date for a technique if we can find who first put the idea into practice.But any technique, once developed, can be used right up to the present - as many collectors know who have been so unfortunate as to rely too heavily on a popular termination date as sure evidence of true antiquity..." (Toulouse 1969b).)Reuse, of course, does not change the manufacturing date of the bottle itself, but care must be exercised when using the known date of one or a few bottles to date other items found from the same context.When a likely or known "older" item is found in a known "newer" site it is referred to as deposition lag.