I have a 1903 Mauser 98 rifle. It has matching serial numbers on the receiver and barrel. It is a great weapon specimen. But I am having difficulty finding any specific information on this style. The barrel and the forend both end flush with at the end. There is no bayonet lug but it is 108 cm long leading me to believe it was a calvary or mountaineering unit carbine. Could anyone give some advice on this, also is has some paint on it that is clearly not original. What would be the best way to remove it without compromising the histories integrity or damaging it?