Glass Milk Lid

[donkarlos]

Says "PAT APR 10 1900"
Found it at a bottle dump where most everything seems broken.
Seems like something people might collect?

 

[donkarlos]

Pictures here..





View attachment 1139717

 

[Mackaydon]

Here's a patent for a self-sealing jar issued on that same date--perhaps it refers to your find:
Patent US647233 - Self-sealing jar. - Google Patents
If so, then scroll to the bottom of this page and note the narrative and date for the same jar:
http://www.google.com/patents/US647233dairyantiques.com/Bail_Top_Milk_Bottles.html
Don.....

 

[donkarlos]

Cool - yes the first link looks right. I couldn't find much else except someone saying they're kind of rare. Don't know if that would make it valuable, though.

 

[sunrunner]

lids and closers are always being shat after.