That gray box was for nickle plated revolvers, which is also confirmed by the N on the label. Label was always put on upside down so it would be right side up when the bottom half of the box was placed in the top half for open display. Condition of the label versus old looking box is strange. Normally the labels will also be worn and yellow to some degree. Maybe the label end was stored against a wall or protected some how. The S/N puts it in the 1980 range according to the standard catalog of S&W.