Actually, there are multiple sizes, from 50 to 200 amps, but the 50 amp one has different color wires, so yours should be 70 amps or more. I would wait for some other people to answer though.
possible find out by weight, and size. Red Bricks eg at aliexpress have sizes and grams weight given.
I have a few.. great ESC´s , but mines hard to check because placement in rc builds.