Unknown Amplifier

This unknown amplifier was probably made by Philips. If you have any info about it, please email me.
Click for circuit diagram.
Click images for larger ones.


This amplifier looks very much like the EL3720/00. Maybe it is a special with the same type but a different suffix: EL3720/?? The main differences are: no input transformer and a different output transformer.
A few items are not original in this amplifier: (see circuit diagram) C6a and C6b have been replaced by a 100nF capacitor. C6a (6uF) is defect. R12 is not original. C2 is not original. A resistor was added across C11.