WHAT DOES WINCHESTER GRAND RAPIDS MEAN?

It was not a factory situation for that model. Perhaps Innovative crafting of a normal inventory. Photos would assist to ascertain the appx yr your rifle was made. forty four22LR, not for that 69A’s .22 S, L, & LR. I presume that this intended the chambering and rifling were being suitable for highest accuracy utilizing the .22 LR spherical only.