Nakamichi 420 specs?

Does anyone have the power output and sensitivity specs for this 1970s era amplifier?
I have the Nak 620, which probablyt has the same sensitivity at 1V in 10K ohms, for 100watts output. The 420 was rated at 50watts, I believe.
Bob P.
I have the 420 and Bob is correct.
It is rated at 25 watts into 16 ohms, 50 watts into 8 ohms and 60 watts into 4 ohms. The sensitivity is 1V into 10K ohms.

Relax, have a Fuller's Vintage Ale and listen to some Mountain.......
Thank you Bob and Guinness. An ale sounds good right now...