1937 Australian Proof Crown ANA Certification service.

Discussion in 'World Coins' started by Bob Evancho, Oct 8, 2017.

  1. Bob Evancho

    Bob Evancho Active Member

    I bought a 1937 Australian Proof crown in 1975 for $1700. It was in a heat sealed PVC flip and authenticated by ANA Certification service with a Registration Number C2291 and small certificate. I just took it out of the bank safe deposit box and it has some PVC oil on it so I carefully cut the flip and removed the coin. I then carefully placed the coin in a beaker and poured acetone in the beaker. I carefully swished the acetone, not the coin, in the beaker. I then carefully removed the coin and let it air dry. I did this three times and it looks like two more treatments will totally remove the PVC oil. Has anyone else had this problem with the old ANA service using heat sealed PVC flips? How do I find out if the certificate registration number is authentic for this coin?
     
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  3. baseball21

    baseball21 Well-Known Member

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  4. gxseries

    gxseries Coin Collector

    Wow... Would have been nice to see what it was like.
     
  5. Conder101

    Conder101 Numismatist

    I believe ANACS has a certificate database, but I don't know how far back it goes.
     
  6. Bob Evancho

    Bob Evancho Active Member

    ANA started certifying in 1972 but I checked and the ANACS database doesn't go back to my certificate number. I'll probably have to send the coin in to have it certified. I have to finish conserving it first. I have the typed certificate but it is not a photo certificate like I have for my 1943 nickel on a zinc coated penny planchet.
     
  7. oz_in_ohio

    oz_in_ohio Active Member

    I would have liked to see the kings earlobe
     
  8. Conder101

    Conder101 Numismatist

    I would really like to see that certificate!
     
  9. TheFinn

    TheFinn Well-Known Member

    If you can get a jeweler's solicitor, it will get all of the pvc out of the crevices. Just make sure the coin is held so that the flat surfaces aren't laying flat on the bottom of the beaker.
     
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  10. rooman9

    rooman9 Lovin Shiny Things

    Pics please!
     
  11. Bob Evancho

    Bob Evancho Active Member

     

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  12. Bob Evancho

    Bob Evancho Active Member

     

    Attached Files:

    wprime likes this.
  13. naomi01225

    naomi01225 New Member

    a no the r side pic pls
     
  14. Bob Evancho

    Bob Evancho Active Member

    The coin is back from SEGS and Graded PROOF 63 Details, Environmental Damage. Still looks great. Now it is protected. I washed it 5 times in Acetone according to instructions. All the PVC oils are gone but they still left some slight discoloration. Only 100 minted so still a rare coin. I will use it for show and tell education with an Uncirculated 1937 Crown to explain the difference in strike.
     
  15. Bob Evancho

    Bob Evancho Active Member

  16. Mkman123

    Mkman123 Well-Known Member

    OP, why didn't you send this to PCGS or NGC conservation? Perhaps they could have done a better job at conserving it.
     
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  17. Bob Evancho

    Bob Evancho Active Member

    Good question. I followed instructions I was given and placed the coin in the bottom of a beaker, then filled with acetone and swished the acetone without moving the coin. I did this 5 times with fresh acetone, let it air dry each time and removed all the PVC oils. I studied this under a microscope and noticed the discoloration to the copper in the sterling silver. There is no way to resolve that issue according to a chemical engineer friend of mine. There is no further PVC on the coin but a slight discoloration. I don't think NGC or PCGS could do better to bring the silver color back. It's still a nice coin and will be used for educational purposes. And still a rare coin.
     
  18. oz_in_ohio

    oz_in_ohio Active Member

    so you cleaned it???
     
  19. oz_in_ohio

    oz_in_ohio Active Member

    It is hard to find a low grade of this coin as they were so big, no one had them in their pockets due to the weight and size..UNC ones are everywhere down under
     
  20. 7Jags

    7Jags Active Member

    Not to experiment with this one but I once "treated" the surface of a matte GB 1937 with very mild ammonia which took care of the problem - I liberally irrigated the surface afterward for quite a while as that one is close to unique in private hands.
     
  21. rooman9

    rooman9 Lovin Shiny Things

    Haha you’d be surprised. I have a 1938 crown in probably VG condition.
     
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