Yamaha - EQ-70 / 10-Band Dual Stereo graphic equalizer

Description:
Stereo graphic equalizer Yamaha EQ-70, from the "Natural Sound" range, with 10 bands of 1 octave per channel (30 Hz to 16 kHz). A classic piece of Japanese hi-fi from the 80s, made in Japan.
This unit belonged to my grandfather and was kept unused for quite a long time, which caused it to accumulate some dust and storage marks on the surface (see photos). In testing, it powers on normally and the sliders/indicator lights work — however, I have no technical electronics/audio knowledge to guarantee 100% internal operation or identify hidden faults, so it is sold as-is in its current state, without in-depth sound testing done by me.

Condition:
Power on and indicator lights turn on normally
Surface marks from use/storage on the top cover ( superficial scratches, dust)
Not exhaustively tested for sound quality/internal operation
Sold as "functional vintage piece – cash on delivery"," with no guarantee of absence of internal defects

Specifications:
Brand: Yamaha
Model: EQ-70
10 bands of 1 octave per channel (L/R)
Inputs/Outputs: Line In/Out, Tape Rec Out/Playback (RCA)
Power: 5W / 220V - 50Hz
Made in Japan