89D Deep Proof Like or not.

I paid $50 for this in 2011. I was extremely fortunate to have started my PL collection before PLs really got hot. Over the past few years, PL's have gotten really hot (although many of them seem to have cooled over the past year or two).

Depending on what grade you think it would get, it may definitely be worth submitting. Honestly, I think that's why certified pops are so low - you have to have a high enough grade to make it worth submitting.

 

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@physics-fan3.14 I think I will hold out till I have a few more to make it worth my while.
It's hard to judge differences between yours and mine because of the different lighting. But I don't think they are very far apart.

 

Your pictures in post 7 have a very similar quality to my coin. I think you may have a pretty good shot at DPL.

For some reason, this date produced a few DPL examples where other dates did not.

 

Of course you're correct that a burnished planchet won't create a PL by itself. But I contend two things; a basined die striking a burnished planchet produces a much more dramatic PL and that a polished die striking a burnished planchet produces an unusually shiny coin.

I could be mistaken about some of these points since the mint had always said that mint set coins were the same as regular production coins and wouldn't release any details about how these were made. Finally in 1997 they admitted the best coins went into mint sets and a few details were released starting ~2001. Most of what I know had to be gleaned just by looking at the coins and comparing them to regular issue coins.

There are a lot of surprises in the mint sets.

 

FYI, I posted below to a new thread instead of buried here.

The US MINT has a few Alternative Metal testing documents which includes a few (many) things they did to the dies to increase longevity, etc over time. From die lifes of 300,000 to 1,000,000 with various coatings (to just expecting low quality) including chrome nitride PVD-coated circulating dies which did not increase longevity.

There's so much in these documents, the link below is 400 pages, so I can't even write a brief about it.

They reference Burnishing in there as only the Dollar coin is burnished now as of 2012.
Costs, metal tests and options for Cents including CPZ - Copper Plated Zincs which uses an 8 micron thick copper plating (now you can post that to all the damaged CPZ pictures you see).

400 pages of fun information for the Numismatic Geek
https://www.usmint.gov/wordpress/wp.../ctcr-alternative-metals-study-2012-08-31.pdf

I'll try to find the one that is even earlier than this one.
I have downloaded versions if it doesn't load. Their servers are slow.

just searching for burnish... here's one hit

which was done to an A190 strip to improve the metal planchets themselves, and not necessarily the die. As stuff added to the die wears out quickly, whereas to the planchets will keep "lubricating" it, which they picked up from the RCM test samples sent to them for some test.

Of course, then they figured out some other process which made burnishing not needed.

have fun reading ....

oh, they don't mention half dollars much as they are the same type of composition as dimes and quarters.

can someone find a prototype $1,000 coin ... hehehe .. go searching.

 

These photos are much better. Doesn't make it look like it was polished.

 

That's really interesting. I have always wondered if they chose certain coins for the Mint sets or if it was basically by random. I have been searching mint sets as of late, and what I am still puzzled by is the range of details that you get in them.
From high grade coins to those that I would just throw into circulation.

 

I wish this link worked. Maybe because it is already in a pdf it needs to be sent by email.

 

Ready for the intensely lit photos?

 

try this post - I attached the PDF and provided the US MINT landing page for the article (rather than hijack this thread).
https://www.cointalk.com/threads/alternative-metals-testing-for-us-coinage.333055/#post-3362244

 

Thanks @Clawcoins