1964 Kennedy Half - Mint Error (clip) or PMD?

Not part of this thread, but I thought this was very interesting...note @ 6:20 that the worker is "ringing" the coins...old timey quality control. Can you imagine what the OSHI guy would say today!!

 

Log in or Sign up to hide this ad.

Morgan silver dollars required 130-150 tons of pressure for striking. I don't know how much is required for half dollars.

Chris

 

This is probably going to sound dopey but, would a variance of 20,000 tons of pressure be what causes the difference between the weak and strong strikes silver dollars are known for. Was that difference in the tolerance the norm?

 

Now I'm "upset" because I want a pizza and don't have the coin to get one.

 

That is probably part of it, but with O's for example, they were know for their poor strike, especially in the early years. Someone here posted a list of the year to year breakdown as to which "O" strikes were better than others.
@physics-fan3.14

 

Tommy, I used the variance of 130-150 because various sources have used different numbers. For example, the VAM Bible has suggested "as high as 150 tons" while other online sites have suggested that it is closer to 130 tons.

It's my understanding that much of the problem with so-called weak strikes coming out of the New Orleans Mint were the result of improperly annealed planchets.

Chris

 

Thank you fish & Chris.

 

Just don't call me "Chip"!

Chris