How do you date old glass?

In most cases, one- or two-digit numbers are actually mold numbers that indicate the specific bottle mold or section in an automatic bottle machine. If numerous molds were identical, each one received its own number. Base numbers also indicate bottle styles or shapes, manufacturing dates, or factory location codes.

How old is glass with bubbles?

According to AntiqueBottles.com, bubbles are rare in glass produced after 1920, so the presence of a bubble may help to date a bottle or window.

Do bubbles in glass mean its old?

Bubbles are not considered damage. In fact, bubbles usually add to the appeal of old glass. Glass made after about 1920 does not usually have bubbles. Crude glass almost always has bubbles.

What is the most popular color of Depression glass?

The most popular colors for Depression Glass are light-to-medium green, pink, amber and clear. Other colors include pale blue, ruby red, deep cobalt, canary yellow, ultramarine, jadeite, amethyst, black, jadeite (opaque pale green), delphite (opaque pale blue), monax (translucent white), and white (milk glass).

Is there Braille on glass bottles?

According to our pals at Owens-Brockway, makers of lots and lots of bottles for lots and lots of beer companies, the string of tiny lumps is a binary or hex code (depending on manufacturer) that indicates in which set of molds the bottle was made.