1969 jefferson no mint mark

I stumbled on this nickel and when looking in my book there was no place for it. I have both the 1969-D and 1969-S. And when researching it, there was no Philly? Is this something? Mint Error or die polishing error?

 

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It's probably hiding under the dirt/grease buildup

 

There's nothing there.

 

Was the D or S dissolved and the black spot is a chemical reaction? I am asking if it is possible.

 

Your right Oldhoopster! I didn't think the dirt/grease was enough to hide it. Thanks

 

No Philly nickels 68,69,70. That's interesting. Perhaps because they made all the coins in 65,66,67 and needed a break.

 

All the 68, 69 and 70 nickels were made in Denver and San Francisco, but due to either filled dies or die polishing (Who knows there might have even been a die each year that didn't get the mintmark punched into it) 68, 69, and 70 nickels without mintmarks do exist. I have mentioned them many times, and I have had some in the past. For some reason no one has ever really paid any attention to them. They go ga-ga over a 22 cent without a mintmark or a buffalo nickel with part of the front leg polished off, but no one cares about an "impossible" nickel.

 

I have one also. No mint mark 100% positive

 

Pics please.

 

look this is a 1969 Nickel without mint mark

 

Better and closer pictures would be nice. Crop out everything but the coin and post using the full image option not thumbnails.