There is a white crust stuck next to and in the devices on this coin. It just went into a small glass of distilled water. The crust does move fairly easy when poked with a rose thorn. Hopefully this one will be easy to restore. If you have any ideas on what this is I could always use the help. I hope that this isn't some kind of bronze disease. To me it looks like the medal was soaked in acetone to remove what ever was on it. But what was on it wasn't organic. This often makes the contaminant turn white. I will keep you updated on the progress.
Hot water didn't faze it at all. This one was unfazed by distilled water. I believe that the acetone dip is what turned the areas of corrosion white. I have done it many times on bronze and copper, especially Lincoln cents. So I did not give this a soak in acetone. I wish that I had a bottle of Verdi care. But haven't been able to get one, so that one was out of the question. MS70 was the only treatment that I really had at my disposal. It wasn't a quick fix with MS70 either. This took quite a bit of time. Coating the medal with a q tip, letting it sit and then rolling a wet q tip on top to remove the encrusted areas, As you can see there is still some areas on the reverse that need to be removed. Here is a couple different camera angles and settings of the coin. I am still unsure how this coin is supposed to rotate. Medal alignment with I think some slightly rotated dies. Coin Alignment When I finish the last treatment on the reverse it will go into the coin cabinet to get a skin on it.
This coin was definitely a late die state. There is very faint die crack going from rim to rim. Starts at the C in century and runs thru the G in progress. The crack is bilevel meaning that it may have turned into a cud not to long after this medal was struck. There is a small die chip in the A, hard to see but another little die chip at the top of the F.
Some fun before the D Broncos game. I found a bunch of material to add to this coin. This is a real life Photo of the grounds to the SE. https://www.architecture.org/learn/...try/1933-1934-century-of-progress-exposition/
I really enjoy the Art deco man on the front. Here are a couple looks at some exhibitions and the front of one of the exhibition halls. All future photos are from this book. file:///C:/Users/Owner/Downloads/Official%20guide%20book%20of%20the%20fair%20Chicago,%201933.pdf Page 10 of the index gives you a real life look at the fairgrounds.
Page 10 gives you a bit of history on a couple of exhibits. file:///C:/Users/Owner/Downloads/Official%20guide%20book%20of%20the%20fair%20Chicago,%201933%20(1)%20transparent%20man..pdf
I am not sure why the link isn't working, Pg 137 had the official medal specifications. There were 3 sizes 2 3/4, 2 1/4, 1 1/2 Mine is a 1 1/2" medal. The first piece struck was given to FDR. Also on pg 137. If you like interesting history, check out pg's 129 to 133. Ft Dearborn. Rutledge tavern, and Lincoln Berry store.
The dealer also had this token Dr. Wests 2 1/2 cents. If you get down to the end of the book I posted earlier. It writes out the vendors, the contributors to the fair, and I can't find any information on a DR. Wests being at the fair, let alone a redeemable token. Nor, can I find the Western Co. Chicago
