That was the name of one of Roger Meyer’s 6 Russian cultivars.
If RM’s Russia #2 is the same as Chinese Red Dates Russia #2, then I don’t think that it is Massandra. The fruit isn’t anywhere near as long. It is similar to Black Sea instead. Add in the new Confetti from OGW (“Yalta No. 2 cv.”) and the Russian varieties are getting pretty confusing, just like Winter Delight.