Need help in dating a Musket.

[100Fathoms]

It's important to note that firearms are not like cars. In automobile restoration the whole point is to make them look pretty and 'like new' again. But such a restoration utterly destroys the collector value of a gun. (Not that your gun likely has much intrinsic value.) You can clean them, but you shouldn't polish or re-blue them, for instance.

Only a qualified Museum grade Armorer should attempt restoration of an old firearm, and only if the Musket is valuable enough to justify the expense. Otherwise as acrsome stated, clean the weapon's metal work with a lightly oiled rag, and use a light solvent and a bore mop to clean the bore. Don't let some random carpenter try to repair the stock, see a real gunsmith.

 

[TRH]

Methinks you'd be better off dating a fiery young pistol instead.

 

[Benjideaula]

You need help in dating a musket eh? Well... You certainly are an interesting type of person.
Not sure if this applies to muskets, but you could go with the cliche romantic dinner with a dimly lit room, some candles, overpriced fancy dinner, some wine. Tell the musket some jokes, get to know it, and if you feel confident enough, tell the musket your true feelings for it.

Oh wait, you meant date as in figuring out how old it is.