The bolt handle on the 1952 came blued. The next Models after that were polished in the white (56 &61).
The 1952 was the last to have the old style European stock with the lower comb for iron sights but the first w/the swept back bolt handle.
No charger clip slots starting with the 1952. Safety slide button was still steel on them too. Models after were plastic IIRC.
The Model 1950 was the last of the traditional looking M/S with the straight down spoon handle, old style stock.
A G&H side mt is a nice item and pricey also.
Some have windage built into the rear ring,,others don't.
The mt should be marked in the rings somewhere as to the size of them. Either in inch or m/m.
7/8" was a common size at one time for scopes like the Lyman and Leopold Alaskan and others of that size.
If you don't want to use the side mt and a 'scope, the mounting rail can be simply removed from the side of the rec'vr.
Take the bbl'd action out of the stock. The rail/mount plate is attached to the side of the rec'vr on the outside flat of the magazine well by dovetail slots and a screw.
That leaves a very narrow slot along side the rec'vr with that plate missing. The original gun came with a 'dummy' plate in place to fill that space. They are around if you look hard enough. Most people just disregard it or fill it with a wooden filler piece.
The G&H side mt complete is probably worth $200 +/- by itself in nice condition and depending on ring size.
Kahles scopes are (were?) some top notch optics. Austrian made
Take note of the specific model and do some homework on it.
Many of the Kales scopes go for $1000 and up. They do retail some for under that but not way under. Used can still sell for $300 or so depending on model.
I don't know if they've been infected with cheaper China import made
products simply branded with their name or not,,but the originals are very well regarded.
I'm not much of a 'scope guy myself.
Accuracy?,,expectations of bench rest rifle performance probably not. They are hunting rifles and as such perform just fine.
I have several of the original M/Sch Models 1903, 1908 and 1910. They all shoot just fine and would easily take a deer (or a woodchuck) at 150yrds even with my barely sunrise side of 70 eyes.
No scopes on any except one of the 1908's that came w/a period scope in claw mounts.
'Needs work" What else is new....
Having a M/S as a backup deer gun would be classy!