Several of the ones listed around the 570-580 range were issued in 1960. There were several Pony Express issues, a Boy Scout issue, and maybe a few others. I don't have the book in front of me at the moment, but all of these are common so you should be able to fish them out of the NGC pop report.
Here's the ones I found....on a quick glance.... I think this is most.. there may be others.... (Note: descriptions abbreviated to save typing - if you need more specific info on either please pm me)
1960 Alaska Festival of Music (2) metals 1960 Boy Scouts 1960 USS Enterprise 1960 Mardi Gras 1960 Pony Express - Official medal (2) metals 1960 Mumey Dollar 1960 East Tincup Dollar (3) Types 1961 Kansas Statehood Centennial 1961 Mobile 250th 1961 Pony Express Termination (2) metals 1960 Fresno Diamond Jubilee 1960 Jackson City Hall 1960 Old Tucson 1960 Marking Device 1960 Louisiana Pharmaceutical 1960 (Circa) Disneyland (undated but attributed as 1960)
Comments
(Note: descriptions abbreviated to save typing - if you need more specific info on either please pm me)
1960 Alaska Festival of Music (2) metals
1960 Boy Scouts
1960 USS Enterprise
1960 Mardi Gras
1960 Pony Express - Official medal (2) metals
1960 Mumey Dollar
1960 East Tincup Dollar (3) Types
1961 Kansas Statehood Centennial
1961 Mobile 250th
1961 Pony Express Termination (2) metals
1960 Fresno Diamond Jubilee
1960 Jackson City Hall
1960 Old Tucson
1960 Marking Device
1960 Louisiana Pharmaceutical
1960 (Circa) Disneyland (undated but attributed as 1960)
Hope this helps!!
John
Evergreen, Colorado
cadmanco