Here is an 1859-O Liberty Seated Dime in MS64.  It is the F-103 variety and part of the Ex-Gerry Fortin Reference Collection:
 
https://www.seateddimevarieties.com/pictorial/1859o.htm
 
It is distinguished by a medium date that slopes slightly upward and a Medium O reverse mintmark, and considered to be R3.  Rarely do we see these with vibrant Mediterranean blue and amber toning overlying bursting luster that exhibits strong cartwheels while rotating under the light. Oh, did we mention the rich frost on the devices?  Eye appeal, yes, eye appeal................
 
CAC/CACG has beaned/holdered a total of 44 1859-O dimes, with 5 in MS 64, 4 in MS65, 6 in MS66, and 3 in MS67.  The prices double with each step in these grades. There are no CACed comps in MS64 for the past 5 years.  An non-CAC dark, but colorful example when tilting under the light, went for $2400 in 12/22 at Heritage.
 
This coin is approved by CAC.
 
PCGS Cert. #38660745