RK Plum ID

Can anyone help me ID this plum? It was labeled as an elephant heart plum, but it obviously isn’t due to the yellow flesh. It is ripening today, 6/26 in western NC. Fully ripe fruits have a sweet perfumey flavor (kinda like what some plum blossoms smell like in the spring) . Less than ripe have some sour taste without the perfume. Size and color can be seen in the attached images.


I’m taking a guess at Santa Rosa Plum.They resemble them and the ripening time is about right.
What is RK?

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Oops! RK is rural king.

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