Die Fatigue and Machine Doubling - Large Pics
FC57Coins
Posts: 9,140 ✭
While looking through a 1973 mint set for a nice Ike, I ran into a pretty tired Roosie in the set. As you can see from the picture on the left, the coin not well struck, you see a lot of orange peel effect on the fields, and metal flow lines are very evident. A closer look at the coin in two spots, BE in LIBERTY and GOD in the motto showed two neat different types of doubling. The BE in Liberty appears to show machine doubling very well. This is where the die jiggles ever so slightly and causes slight, or sometimes pretty dramatic doubling. The tell tale sign of machine doubling is the "stairstep" effect that you see at the bottom of the "E" It looks like you can step down from the upper surface of the E to the lower doubled image.
On the bottom right picture you see what they call die fatigue doubling. In this case, the die is starting to literally break appart, and little pieces of the die start falling off, thus allowing metal to creep into the voids. In this case around the right side and the bottom of the O and D in GOD you see bits of metal that have fallen off the die, and the letter appear to have kind of an oozy doubling to them.
Just goes to show you that even a poor strike can teach you something about coins
On the bottom right picture you see what they call die fatigue doubling. In this case, the die is starting to literally break appart, and little pieces of the die start falling off, thus allowing metal to creep into the voids. In this case around the right side and the bottom of the O and D in GOD you see bits of metal that have fallen off the die, and the letter appear to have kind of an oozy doubling to them.
Just goes to show you that even a poor strike can teach you something about coins
0
Comments
---------------------------------
"No Good Deed Goes Unpunished!"
"If it don't make $"
"It don't make cents""