1921-S Obverse Doubling.... Best find yet!

Discussion in 'Coin Roll Hunting' started by Larry Squires, Feb 22, 2020.

  1. Larry Squires

    Larry Squires New Member

    Even if it is mechanical doubling. I haven't discovered any other coins with a semblance of doubling in my short time coin-roll hunting. So, I am pretty excited to come across this beauty, stir the adrenaline and emotions, even if to resolve upon the slightly disappointing reality that this is not a newfound 1921 S - DDO.

    However, I am curious to know if anyone uses any enhanced imagery to learn more about there coins. I don't see well, so I used a little edge detection in the following photos. Now, I am curious to know.... if this is the flat-doubling that is representative of mechanical doubling, then what would a true doubled-die look like with enhanced imaging such as the edge detection.

    Anyone try anything similar, especially on some of the older coins?
     

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  3. desertgem

    desertgem MODERATOR Senior Errer Collecktor Moderator

    Yes it is classic MDD.

    Here is the old classic, notice how the 2 overlapping dates, merge into each other at the same height. Most lesser ones are not as equal , but they will be raised. Also look how a true doubled die leave the appearance of a "wider " image as they overlap. MD will shear some off the of the raised portion so it will be thinner than a normal one. Practice. Jim
    55dd0date-1-1.JPG
     
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  4. Islander80-83

    Islander80-83 Well-Known Member

    What exactly are you considering enhanced imagery? I consider your pictures enhanced imagery. Search thru this forum, you will see many enhanced/detailed imagery/pictures. I consider yours flat or shelf like.

    doubling.jpg

    This is what true doubling looks like......

    37994_37655934_2200.jpg
     
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  5. Larry Squires

    Larry Squires New Member

    Thanks, Island. I guess anything could be considered enhanced imagery - even zooming, or adjusting the contrast (or both). I am referring to pixel enhancements that might help delineate characteristics of the coin.
     
    Islander80-83 likes this.
  6. Larry Squires

    Larry Squires New Member

    Yeah... and I'd be thrilled to find even an MDD of that 1955 DDO (as many did after that doubled die was discovered).

     
  7. desertgem

    desertgem MODERATOR Senior Errer Collecktor Moderator

    Larry, in real life there is none, at our level using USB cameras or Digital Photo cameras, it is only by increasing the number of pixels ( money) can finer details be revealed. Any camera under 8mp can only produce an image that the software will fill in fake pixels by guessing which real pixel it should copy and paste into the image. This makes determining varieties difficult and why some new members get so upset that we can't see something their brain is producing ( pereidolia). Angles are the hardest things for most usb as the software doesn't understand them with large pixels ( low resolution).

    People say the military /AI have much higher resolution cameras and more pixels so they can do facial recognition, etc. Digital Astronomy even more so. Maybe some day we can afford that. IMO, Jim
     
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