Dating old glass bottles

Changes in bottle manufacturing took place over years, so at certain periods of time there were different bottle types in use.

As a result of these overlapping periods all time-spans given are approximate.

Before 1900 the bottles were sometimes stronger in thickness.

This does not refer to the shape of the bottle, but to the way the bottle was made.

Madeira bottles tend to come in many shapes and sizes.

In the end of the 19th century then, the method of pressing was developed to perfection and the industrial production of bottles began.

Because of the method, the size and shape of free-blown bottles vary greatly.

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