Here is @JCro57 new book and an excerpt. [ATTACH] [ATTACH]
You've received responses from members that are very knowledgeable of the minting process, errors/varieties, chemistry, and metallurgy. It's your...
Cracks in a hard metal like tool steel tend to be jagged and irregular. The gentle curves on your coin isn't what you would expect from the...
Sorry, but it's the edge of a stain, not a die crack
Die chips can be any shape and would show a consistent appearance from coin to coin I'm leaning towards die damage/gouge but whatever the cause,...
It's also used for bearings. The place I used to work had a couple large, old ball mills to mix/grind powders. They used this stuff to support...
24 hrs should be plenty of time to see of the residue is removed or at least starts to soften. If nothing happens by then, it's unlikely longer...
There are a couple known doubled dies for your precious birth year http://www.doubleddie.com/814618.html http://www.doubleddie.com/1966537.html...
Plating blister/bubbles Reread Wexler's explanation on how dies are made and you'll easily see that a DD can't look like your coin (I'm sure you...
The edge looks like a small rim burr or banking burr. This occurs during the blanking process (probably a dull punch). I wouldn't expect finning...
You have the KM-89, and 1936 is a better date. The Weimar KM-37 are the common ones. I would suggest searching MA shops to see what European...
@Italy8686 You can’t compare acetone to a salt/vinegar solution. Acetone is a solvent that will remove organic contaminants. It doesn’t react...
Why do you think members would call your coin garbage? Haven't you been given correct answers to your previous questions? There are many...
[ATTACH] Edit to add: actually i think this is Doug informing members they've broken the rules, not the secret handshake
"There is no poetic license in science" - Schrodinger's Cat ;)
Trying....to....stop....myself....but :lock: @paddyman98 I thought you were referring to finding coins that were graded AG-3 or belong to an...
1. There is no licencing requirements to become an "expert". Members build credibility by regularly posting accurate information about numismatics...
Sorry, not quite following the request in the OP, but here are some German notgeld [ATTACH]
The cause of the damage is irrelevant. Maybe it was a sander, maybe it was something else. The IMPORTANT question is - how could this occur in...
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