It does not appear to have a nickel finish. Looks like blue. However, the hammer and trigger also look like they are blued - which would indicate a refinish, if so. Perhaps the pics are tricking me.

If you think it is nickel because of the N7 in the yoke area, that is just a fitter's mark. It has nothing to do with the finish.

The stocks are not original, so somebody has definitely changed this gun. It did not come from the factory looking like that.

Oh yes. Welcome to the Forum. You came to the right place to ask questions.

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Jack
SWCA #2475, SWHF #318