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hankronThe sepia came with time. The pink was original (blue and yellow and other such colors would be natural as well).
As noted earlier, unless there's something bad caused by the color or toning (splotches, uneven, fungus, way too dark), the image should be graded by its clarity and overall appealingness. The pink may be original, but if the image is too light the image is too light. The sepia may not be the way it originally was, but if the image is sharp the image is sharp.