Once you've seen a few repros it's pretty easy to spot one on a table.

At the end of the day the blower and his team would get paid for the amount of jars they produced as determined by the number of jars made with a given number on them. Later, when glass making went to machine the numbers represented the mold or machine the jar was made from (usually 4-8 molds per machine or one to several machines per factory.) That way the plant manager could check quality control, production, etc.

There is a rumor that jars with the number 13 were more valuable because superstitious people were afraid to can in them, broke them or threw them away.

The half gallon Ideal is maybe $5, with the half gallon Ball mason a bit less. The 1858 you have is very nice, I found one that looks very similar (would you say so? I'm curious about the whittle mold though, and it's rarity if any. Ball Ideal & Atlas E-Z Seal jars didn't appear until about 1908, and were in production until the 1950's. cross & does have some value in its own right as it enhances the value of the jar.

The Mason's Patent jar is probably in the $5 range, made before about 1900 if it has a ground lip, after 1900 with smooth lip. Jarsnstuff very correct in that you have a nice starter collection! It looks just like it but I'm kind of confused, but shouldn't the glass top jars have come first? Now, as for "whittle", it is believed that the first jars blown on any given day were blown into cold molds.

Variations of the glass lid and wire-bale scheme of the Lightning jar were produced for home canning into the 1960s.

The earliest advertisements for the Lightning jar date back to the year 1885. Putnam was the man behind the marketing of the Lightning jars and making them popular. Putnam also held exclusive ownership of the patents, and for many years, claimed the impressive profits from selling the jars.

They all have glass lids, the half pint says Ball Ideal, # 5 on bottom, 2nd jar from left says Ball Sure Seal, # 2 on bottom, third jar from left says Ball Ideal with pat. fourth jar from left is a slightly different color, says Ball Ideal, with pat. Robert Barqs19 Here are the other jars, left to right is a half gallon screw top Ball Mason, #5 on bottom. Ball Ideal with pat date of July 14, 1908 on front, # 9 on bottom. "Atlas E-Z Seal" bottom says Atlas E-Z Seal Trade Mark Reg. One of the problems with trying to determine value to your jars is that fact that there are so many different variants to the Ball jars. Without having the jar in hand it is hard to ascertain which variant you have.

Second from left is a glass top Ball Ideal half gallon with Pat. The half pint jar Ball Ideal seems to be the most valuable with a listing of -100, if it is the same variant which is listed in the Red Book #9.

The reaction of the molten glass to a cold mold gave the whittly effect we all like so much.