TVG can provide a scope base suitable for your classic rifle. There is a wide range of models to fit most classic military rifles. These are good mounts that provide a number of options in terms of ring types and sizes. TVG has been fitting these mounts for a number of years and although billed as a non-gunsmithing mount, some do require fitting, removal of wood and all of them have peculiarity's that the shooter will not necessary be aware off and make fitting frustrating or worst still a disaster.
Besides the obvious cost benefits to these designs, shooters opt to use these mounts for a number of reasons. The most common are to improve the rifles performance or mounting a scope as the shooter can no longer utilise the iron sights due to deteriorating eyesight. In my professional opinion scopes sizes should remain moderate to retain the character of the rifle and therefore the scope should also be of a classic design.
The MAS 36 mount is one of the few designs that I have encountered that requires no alteration of the rifle at all. However the unusual bolt handle design means that the base is slightly off-set to the left and limits the number of scopes you can fit. The base is only available as a weaver base and the classic weaver 2.5 is ideal as the scope sits low for good cheek weld and avoids any conflict with the bolt handle.
Springfield 1903 & A3
The pictures depict only the 1903A3 model and shows the adjustable base although it is available as a weaver model. The base secures using a band around the receiver and a clamp to the rearsight dovetail. However wood has to be removed to permit clearance for the band and the upper hand guard cannot be fitted unless it is modified. This is not a problem for the 1903 rifle.