how do we determine a bottles age

[jojo]

How do we know if we have a old bottle.I am learning about the seam and if the weight is on it it's in the 1930'. But i have a few without the label,no weight just symbols on the bottom.Is there a book,that show's us the symbols from the manufacturer as to give us a rough idea.I am just starting out.And i want to know what to keep, and what to leave for the next person.Alot of mine have the circle on bottom from side to side.Is it a blown bottle.jojo, the western mainiac

 

[Bottleman]

JoJo, I posted a link to a website below that will help you identify the age of bottles you find. There’s a lot of information on that site and if you click on the links in the blue on the left you can find more out. Hope this helps.

http://www.blm.gov/historic_bottles/dating.htm

~~Tom

 

[cowseatmaize]

Here's the one for some of your sybols (makers marks).
http://myinsulators.com/glass-factories/bottlemarks.html

 

[GuntherHess]

You can try this section on my web site to help date stuff...
http://www.mattsoldhouse.com/MC/bottles/bottletypes/bottletypes.htm

good luck