Need help with a 1966 NMM Kennedy half

This coin has a mirror finish that you can use to comb your hair with. At first I thought it was polished or plated.
The obverse device has the same mirror finish as the fields. The date, all lettering and the reverse device are cameo frosted. Striations appear in the fields on both sides. The cloudiness and color(s) in the fields that show in the pictures are reflections, the actual coin is simply highly reactive with a perfect mirror finish and a “hula hoop” cartwheel on the obverse and a perfect spoke on the reverse when rotated. The pink in the middle picture is my finger 12” over the coin. In hand and while using a 10X loop and a 10X/20 stereo microscope all details are crisp. It weights in at a normal 11.35 and the edge shows the copper core like a 40%'er should.
I know there were no proofs made in 1966 and it rivals any proof that I ever saw. I am stumped to explain this coin. Any thoughts?


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What is the weight?

 

Polished and buffed. Wait for more opinions...

 

11.35

 

My first thought, but how can the frost on the lettering and the eagle be explained?

 

What is "NMM"? No mint mark? If so, I wish people would stop calling them this. It's just a Philadelphia minted coin and it's a given that none of them had mint marks until like 1989 or something. Sorry but this is a pet peeve. Your coin looks like something from Littleton, i.e. highly polished and buffed. Possibly even plated.

 

I'd be careful if I were you. @charley might not take to kindly to your pet peeve. He's the same way with people who complain about the misuse of words that sound like contractions. He's always right, you know!

 

Yikes!! Yelling At Cloud Attack in Room 6, again! That is #5 in 3 days Dr.!! I am concerned!!
Has he started piddling himself, yet, Nurse?
No, Dr.
Then don't worry. Call me when he does.

 

If it's a pet peeve why did your reply start with two questions asking for clarity of what does NMM mean? Did you develop a pet peeve based solely on what my title may have meant? Would you have replied at all if I did not include NMM in the title? What makes you so wonderful that people should or should not do things that are your pet peeves? Who cares what your pet peeves are. If the use of established numismatic acronyms bothers you so much perhaps you should find a different hobby and leave the rest of us alone. You must be a lot of fun in the line at the bank or at the DMV.
If its possibly plated why does the edge show the copper core?
If it's possibly buffed or polished why does the motto and the device show frost, the fields show striations and the coin show cart wheels?
Do you have any numismatic knowledge to answer these questions?

 

It really looks polished to me. The reverse may have been done with a small buffing wheel like a dremel, going around the devices.

 

Polished or plated but it ain’t natural.

 

In 1966 there were no mm on any of the US minted coins. 1965 and 1967 as well. Were all the coins of those years minted in Philadelphia? No.

 

yup yup polish job without a doubt

 

SMS piece. Not polished, just removed from a set.

 

I agree with @TheFinn this is from an SMS set. Most if not all have this appearance. These can also be found in cameo and deep cameo.
https://www.pcgs.com/coinfacts/coin/1966-50c-sms-cam/86846

 

Look closely, those surfaces should have radial flow lines.
Look for the luster
Both these coins show what I am talking about. From an SMS set.

 

Most SMS rival the proof editions.
As you can see in the photo below another SMS Kennedy I have
The coin is highly reflective. Then compare it to the Proof below it.


One thing you will see in both photos is luster. If the surfaces don't look like the above then you have a whizzed coin.

 

Coin defiantly has luster as I described in my original post. Thank you for providing this info and pictures! What caught my eye with this coin is how this SMS rivals many proofs like you state. Truly unique!

 

Sir can you elaborate more on what you describe as radial flow lines. Still Learning and you clearly seem to know what you are talking about.

 

Radial flow lines happen upon the striking of all coins. because of the convex shape of the dies the center of the dies are what makes contact with the planchet first. It forces the metal outward towards the rims, Kind of like a sunburst look. These lines are always present on the surfaces of a coin. Some almost invisible to the naked eye as in an early die state proof coin, And some extremely visible. The flow lines will worsen as the dies strike more coins.