Need help for a component of AR 1500

[Claude Gas]

The name of the component is 7205 or F 442-20 and it is a six pin ic.
probably an audio amplifier, it works in an Heathkit AR 1500.
I am a technician in electronics and my spéciality is PCB's.
It is a client who ask me for this and he will be very happy to find it.

Thanks for your attention
Gas Claude

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