Welcome to the Forum! As others have already stated, it appears that your revolver frame has been mis-marked by S&W and that the mis-marking doesn't really affect the gun's value one way or the other. However, that brings up an interesting question or two that I don't know the answers. Do L-frame revolvers use the same length cylinder for all calibers? I know that the .44 Magnum and .357 Magnum cartridges are almost exactly the same length, but are the corresponding cylinders the same size? Also, if they use the same length cylinders, would the OP's 5-shot Model 69 (.44 Magnum) use the exact same frame as a 6-shot Model 686 (.357 Magnum)? I'm just wondering how S&W would mix up those two models and mis-mark one of them.