It is probably safe to say that it is over 50 watts of Class A power.
😁 What is safe to say is that it draws 120 Watts at idle.
This is a sort of 'who cares' thing since the point at which the amp goes from class A to AB isn't important; the amp is a class AB amp regardless. What is important is how well distortion is managed by the heavy bias (that's the reason for class A in the first place).