Pioneer - SA-610 Solid state integrated amplifier

Late-1970s integrated amplifier, Pioneer SA-610, from the famous and well-regarded Blue Series, 45 watts into 8 ohms. The potentiometers have just been serviced with a specific product and cleaned of dust, including the display. It is perfectly functional and original in every part. I note a lack of chrome plating on the display frame and some scratches on the lid, otherwise perfect.