Na323 identification?

Hi all I’m hoping you can tell be what kind of board this na323 is? I have a feeling its MC ‘S’ but unsure as all the print says is na323 iss2 on it

Is this any help:-

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The resistor between the input connectors is 470ohm, so they are S cards.

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And, it has been serviced.

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Being lasy, and testing Grok, i asked…er Grok. Who thought the brown band was black. Thus offered 47 ohm. To be fair it is a difficult call. And easier if you know one value is likley 470 and thus a black is really brown.

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All very useful, thank you all.

You are correct its MC boards

Haha, the 323 was the giveaway there !

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