That looks like strike doubling after the mint mark was already affixed to the working die. When you see them both like that, both the date and the mint mark, before 1990 when they were both affixed to the master die, that mostly cinches it as originating in the strike.
@Geezer509, it's a common "tell." There's really no question on this one. Maybe you need other opinions. Just kick back, they'll get here...
