What does this mean?

I'm knee deep in studying my Morgan dollars. Can anyone tell me what, when referring to the 1880, "1880 with reverse of 79" means? Thanks!
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I'm knee deep in studying my Morgan dollars. Can anyone tell me what, when referring to the 1880, "1880 with reverse of 79" means? Thanks!
Comments
link?
do you mean "Reverse of 78" instead?