I bought one of these big guys at Volante Farms yesterday. Volante says this about Mutsu: This Japanese apple is a descendant of the Golden Delicious. It is large, spicy, crisp & juicy. Excellent all-purpose apple. Various sources say this is the Crispin apple by another name. Mutsu is bigger and greener than Golden Delicious, whatever its relation. This is a large fruit, almost cylindrical, with definite ribs and a light green-yellow skin. The color varies from green-yellow to yellow-green and has darker green spots perhaps a tenth of an inch across, some with tiny white centers and some with tiny brown ones.