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 can you tell the date of an old bottle?

There are three keys to help with dating most bottles: Side seams: None: bottle may be free blown, in which case it has a very uneven shape and dates before 1860. Or the bottle may have a nice even shape, but was spun in the mold to smooth out the seams; a practice common around 1900-1920.

What is a pontil mark on a bottle?

The pontil, or punty, is a solid metal rod that is usually tipped with a wad of hot glass, then applied to the base of a vessel to hold it during manufacture. It often leaves an irregular or ring-shaped scar on the base when removed. This is called the “pontil mark.”

When was Duraglas made?

September 23, 1941 Duraglas (in a cursive script with only the first letter actually capitalized) was registered by Owens-Illinois Glass Company, based in Toledo, Ohio at that time, on September 23, 1941.

How do you date a Owens bottle?

Typically, it is marked with a number called a “Liquor Bottle Permit Number” followed by a dash and a second number which is the date code. Many liquor bottles made by Owens-Illinois have the “Diamond and Oval with an I” logo embossed sideways on the base of the container.

What is Duraglas?

DURAGLAS® Fiberglass Filler is the original fiberglass reinforced automotive body repair filler. Formulated with short-strand fiberglass fibers, DURAGLAS provides ultimate strength and durability on rust-outs, holes, tears and cracks. DURAGLAS is ideal for use on metal and fiberglass panels and is 100% waterproof.

When did screw top bottles start?

Invented in the early 19th century, screw tops werent produced with any uniform standards. As a result, they werent widely used until machine-produced bottles became commonplace in the 1900s. Modern bottling production methods dictate the use of screw tops on soda and beer bottles.

Is Duraglass waterproof?

Formulated with short-strand fiberglass fibers, DURAGLAS provides ultimate strength and durability on rust-outs, holes, tears and cracks. DURAGLAS is ideal for use on metal and fiberglass panels and is 100% waterproof.

How do you use fiberglass body fillers?

0:2511:31Applying fiberglass reinforcement body filler on Bugatti and PlymouthYouTube