What's more, Analog Watch Co. says that the rock came from a Luna flight in 1974. There were no Luna missions in 1974. The sample return missions are:
Luna 16 -- 1970 -- 101 grams returned
Luna 20 -- 1972 -- 55 grams returned
Luna 24 -- 1976 -- 170 grams returned
Addendum: could have been a secret Luna flight from 1974, that returned lots of really big chunks of olivine basalt.
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