Old mill site about 200 yards away Bottle dump site

[A2coins]

Found these bottles about 200 300 yards away from old gris mill lots of bottles and cans and looks like concrete blocks I was thinking of collecting some bottles from here but I dont want to waste my time if these are just junk anyone know if these are worth collecting. Thanks its winter here in Michigan I feel trapped cause the ground is frozen where you would have to bring a pick to get a coin 2 inches down.Thanks Tommy

 

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[A2coins]

The bottom of the bottle says 1817 which I doubt is a date for the bottle on the far right in the pics

 

[K1DDO1979]

There may be some old ones around if there are lots and deeper down but the screw on plastic tops wouldn't make them very old. Maybe a 1940's/50's dump?
I like bottles and try to find old ones if I see them but I'm no expert at all! Haha

 

[nhbenz]

If I'm seeing it right that looks like an Owens-Illinois mark on the bottom, and if so this site explains the date codes: https://sha.org/bottle/pdffiles/OwensIll_BLockhart.pdf

 

[A2coins]

Thanks for the info this site is so awesome all the people with so much knowledge and being able to see everyones finds its like coming home from a day of detecting going through my stuff then looking at everyone alses it keeps me sane in the winter I took some more pics of the bottom Im glad they didnt do the same thing with coins as they did with these bottles.Thanks

 

[Tony in SC]

In the last pics, the date looks 1958. Tony

 

[tomhighland]

One mans trash, another mans treasure. I am up north but have sold dug bottles from dumps at the flea markets. Roman Cleanser is popular there as the man that formed the company retired near here.

 

[A2coins]

Which one is roman cleanser

 

[A2coins]

I have left a few bottle dumps of my own someday in a couple hundred years from now someone will find them and be happy