The output transformer sales specification seems to be equivalent to the S-255-S. Single serial 112/116 (both date codes are 8336) primary: 5k-3.5k-2.5k-2kΩ secondary: 4-8-16Ω W100 x H110 x D85mm approx. 3.2 kg/piece (actual measurement, not including protrusions), in good condition, with original box (Kojima Yo)
Accessories: original box
Main specifications: An 8Ω resistor is connected to terminals 1-3, and when an impedance meter is applied to terminals 6-8, 3.5 kΩ is measured. Actual impedance measured by tester between 6-8:49.3/47.6 ohms