1960 d with machine doubling

this is a fine example of strike doubling aka machine doubling, looks cool under a 30x magnifying loop. I have held onto it for a while just for an example

 

Log in or Sign up to hide this ad.

Yup, that is definitely machine doubling.

For the purposes of education: what are the key diagnostics you notice on this coin which make you say this is MDD?

 

testing my knowledge eh? first the is the flat shelf like doubling on the coin second the coin had doubling on the date and mint mark the mint mark is added separate from the die design itself

 

I'm testing your knowledge a little bit, yes. But, I'm also trying to make this an educational thread for many of the other readers of the forum. You're one of the few who has posted a coin that was correctly labelled as MDD.

And you passed with flying colors

For those reading: coins of this era were hubbed and had the mint mark punched separately into each working die. If you ever see "doubling" on both the devices and the mint mark, as on this coin, your immediate first thought should be machine doubling. As with every rule, there are exceptions - but they are incredibly infrequent.

 

here is the exception for that coin.

 

That's the large over small D, a strike-doubled large D, and a doubled die. Nice one, Fedora.

 

Actually it is a small date over large date DDO, you can see that in the small zero over the large zero, D/D RPM, although it is sometimes said as WRPM, as the upper D is pointed by the green arrows. PCGS gave it a MS65 FS-01-1960D-101. Two major (strong) varieties on same coin. No strike or MD. Edited to add , it is a stage 4 die, Late Die State.