it is hard to say which it was if the model is not visible. i show sunbursts around serial 38709 in my records. you can look in the pick up cavity, or under the neck of the guitar where it joins the body for any original paint residue.
depends on the condition of yours, but they seem to be going(actually selling) on ebay on the top end about 3000, down to about 1000 for refinished with still original pickup and bigsby. last red one i have record of in good condition was about 1600
those are very cosmetic in nature, and should not significantly affect the guitar in anyway except looks. the top headstock layer is a veneer. so your cracks are in the finish and veneer if that deep. mainly considered weather checking like worknot said