Made and issued are two completely different things, and it could be that your rifle was made and held in stores and issued late war, or issued as soon as it was made, there is no way of telling. Depending on where it was used (couyld be multiple places) it could have seen many different bayonets mounted on it or carried by the soldier using it at that time. I would not bother too much with what you stick on it, if the bayonet and rifle were not matched and serialed like the Frenchicon ones then just stick anything on it it will be no further from potentially correct than any other.