Below are two articles that give first hand accounts of what treasure hunting looked like before metal detectors became widely available to the public. The first article shows that it was widely known that rings drop off while swimming. You will read references to a coal sieve being used to sift through the early 1900's sand.
The Brooklyn Daily Eagle
03 Dec 1913, Wed · Page 4
The second article describes people finding 25 dollars per day in change at the start of The Great Depression in 1930.
The Brooklyn Daily Eagle
25 Sep 1930, Thu · Page 15
In England a skimmer is a small bream fish
Merril in one of his vlogs had loads of small fish washing up on the shore check it out lol
Posts do have a depression around them so that's probably why they were looking there
Great article merril thanks for this
Regards Tony and Kaz
What on earth is a skimmer? Clam shells? Rocks? Why are there "millions" ? Why are they a health threat? This article raises more questions than it answers! Seriously though, good article. Not sure of the validity of post-searching though.