1968 no mint mark dime

Hey new to collecting..came across a 1968 dime..was curious if you think it might be from Philadelphia..I know they don't put their mint marks on there coins sometimes..thanks

 

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Yep, 1968(P). They started putting the P mintmark on nickels to halves in 1980, and SBA dollars in 1979. The 2017-P was the first year with the Philly mintmark.

 

Thanks for the response

 

For the cent. The dime also received the mint mark in 1980.