GBrad Posted March 21, 2020 Share Posted March 21, 2020 As I have previously said in the past, I am not into posting frivolous items. I am trying to learn here on this forum and to date everyone that has responded to my posts have been OVERWHELMINGLY supportive, nice and more importantly informative. I came across this 1975 P cent today and as always I look at both sides of a coin before I throw it into my “keep pile” or my “return to the bank pile” (obviously I keep all of my copper)...... So, when I looked at the reverse of this 1975 I clearly saw, under a simple 10 power loupe, what is pictured below. Based on many many expert comments and opinions on this forum I have come to realize (well... I think I have learned.... ) the difference between a true DD and die deterioration as well as MD. Based on what I see here, and my knowledge of die deterioration, MD and PMD this, to me, just doesn’t fit the bill of any of the above. It looks to me that there is true doubling on the letter A, S, and on the O of “OF”. Maybe I’m way off base here, as I know from my research that there has never surfaced a DDR 1975 P, but who knows..... Please look at the A. The doubling is slightly higher than the actual effect. It’s hard to see in my pic but there appears to be doubling on the E as well. As always, any input or feedback is greatly appreciated. Thanks to all!! -Greg Link to comment Share on other sites More sharing options...
GBrad Posted March 21, 2020 Author Share Posted March 21, 2020 Link to comment Share on other sites More sharing options...
GBrad Posted March 21, 2020 Author Share Posted March 21, 2020 Link to comment Share on other sites More sharing options...
Coinbuf Posted March 21, 2020 Share Posted March 21, 2020 Looks like strike doubling from what I see in the photos, would need to see the serfs display some splits to call in a true DD and I just don't see any of that. The "A" of states does look close at first glance but its seems that the second "A" is lower in relief and shelf like compared to the main letter strike which is a clear sign of strike doubling. In a true DD both the main strike and the second strike will be at the same height away from the field. Link to comment Share on other sites More sharing options...
GBrad Posted March 21, 2020 Author Share Posted March 21, 2020 Good knowledge. Thank you. I will try to take some more pics. Thanks! Link to comment Share on other sites More sharing options...
GBrad Posted March 21, 2020 Author Share Posted March 21, 2020 If you don’t mind, would you look at the O in OF, it definitely shows a split on the letter. In addition, the bottom of the S in STATES is slightly missing it’s serif in relation to other coins of this year. Once again, I will try to take some better pics for you. Thank you for your time!! -Greg Link to comment Share on other sites More sharing options...
Greenstang Posted March 21, 2020 Share Posted March 21, 2020 (edited) That is Machine Doubling. Here is a explanation with a photo I borrowed from the CCF that might help explain the difference. Note on yours how the secondary image is lower and the devices are thinner. A sure sign of MD. Machine Doubling1. Always cuts away at the normal thickness of the devices affected. This in effect makes the device that stands out in relief thinner than it should be.2. Has a step-down appearance to the 'doubling' which lacks character, boldness, and thickness.3. Never shows 'notching' at the corners of the devices because the original die used to create them does not have this notching.Hub Doubling1. Always has extra thickness to some degree - in other words, the doubling never robs from the normal devices to cause the doubling.2. In many cases 'notching' shows at the corners of the devices where the overlap in hubbing occurred. Just look at the picture, find 'notching', and this statement will be very clear.3. Hub doubling actually creates a secondary 'set' of devices, which is apparent when looking at the doubling. It has relief - character. Machine Doubling only flattens parts of the only set of devices that exist, because there was no doubling in the die that created the coin. Edited March 21, 2020 by Greenstang Just Bob 1 Link to comment Share on other sites More sharing options...
Just Bob Posted March 21, 2020 Share Posted March 21, 2020 Greenstang is right. Notice how the center curve of the second "S" in "STATES" is thinner than the first "S." That means metal was moved during the process of striking. On the die, they would have been the same size. (Not accounting for die wear, etc.) Not a doubled die. Link to comment Share on other sites More sharing options...
RonnieR131 Posted March 21, 2020 Share Posted March 21, 2020 Finally! Thanks. Exactly the description with pictures we needed. Case closed. Link to comment Share on other sites More sharing options...
GBrad Posted March 21, 2020 Author Share Posted March 21, 2020 Hello gentlemen. Thank you very much for your input and for that excellent diagram Greenstang. I was really hoping that I’d found a true oddity but sadly not so.... darn. You guys are truly a plethora of information and I value your years of experience and expertise. I’m going to keep on looking though as this has become somewhat of a passion!! Thanks again!!👍 Link to comment Share on other sites More sharing options...
