I have five Newtons kicking around,some in original configuration, others not. It is evidently unusual to find a Newton with matching numbers. None of mine are completely matching. Two had Springfield barrels when I got them. I don't know if they were replacement barrels, or barrels Newton used when the supply of German barrels dried up with the start of WW I.

On the plus side is the unique takedown system and the bolt handle cleared for low scope mounting. In that respect it resembles the Krag. Not so good is the safety. It works well with a low scope, but the operation is counterintuitive. Pull to the rear to unlock, push forward to lock. The multi-lug bolt is of dubious merit. I haven't checked, but I doubt that more than two of the multiple lugs are really engaging.

The streamlined receiver is a plus, the set trigger works well, if you like set triggers (I do).
The floorplate release is like that of the Model 70 Winchester, on the cantankerous side, but generally stays latched.

The stocks tend to split behind the recoil lug, especially in the larger calibers. I don't own a .35 Newton, but my .30 Newton's stock is split. The stock is on the light side for a cartridge that powerful, although it is perfect for the .256 Newton, my favorite of all the Newton cartridges.

The flat top sections on the receiver ring and bridge are ideal for scope mounts, but are not drilled and tapped. Considering when these rifles were built and the availability of scopes, this is hardly surprising. Two of my rifles have Zeiss Zielklein scopes in Redfield Senior mounts.

In short, reverse the safety, reinforce the stock, drill and tap the receivers, assemble the actions with all matching numbers and lapped in bolt lugs, and offer an alternative to the set trigger and you have a thoroughly modern rifle.