Part II: Revisiting the "Virgin" Site of Swedish Tavern, page 62
Metal Detecting "Clipped Planchet" Coins
Whoever had hunted at this spot before, did not bother with small coinage, or his detector was not tuned right. E-Trac seemed to "register" the small copper coins without a problem.
Another "Leftover"
This was another Russian coin from the 18th century, which had so called "clipped planchet" defect that occurred during the minting process.
Russian 1735 Polushka (1/2 Denga) Made Out of Clipped Blank
The clipped-planchet defect was caused by misfeeding the sheet coin metal through the blank-making machine in the early stage of the coining process. When the strip of sheet metal was not fed through far enough, the punches struck an area of the strip which overlapped the hole left by the previous strike. Thus a blank without a fragment was produced.
Then, as the process continued, a clipped planchet would be struck with dies, and a defective coin had been minted. After having been overlooked by the Quality Control, the coin was released into circulation. A clipped planchet may have an edge of various shapes: curved, ragged, elliptical or straight.
Another Example of "Clipped Planchet" Coin I Found at Krog
...Among those abilities that were lost by humans millions of years ago could well be the natural abilities we can still observe in animals: ability to see in dim light, hear ultrasound, and have natural navigational and sonar systems. And these are only a few abilities we have managed to discover in animals so far. So there is a possibility that animals still have an ability which I have been thinking about, and of which some humans have only a tiny "residue" in them...
