Speedometer question: 1960 Valiant

The cluster is 260, the NOS is 250. My concern, is the NOS going to fit nicely into the cluster, or is it not? The junkyard cluster, is well, might I be buying a piece of junk? I am leaning towards the NOS. If it doesn't fit, well I can return it. Talking it out, I am answering my own question.

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