DuckBuster,

In general , the recognized MS models 1900, 1903, 1905, 1908, 1910, 1924, HV, 1950, 1952,GK, NO, 1956, Magnum, 1960 MC(debated) MCA, (and of course the 1903/14/24/30 etc Greek military)

If your gun has a Monte Carlo stock you most likely have a 1956 or an MCA. The top of the front ring should indicate the model. The year of production (58) should be on the side of the barrel shank.Some European delivered guns occasionally would have stamped "Styer 1958" in small letters though not generally considered a model, only a year of production.

All MCA's and most 1956's were pre-drilled for Redfield bases. Most in this vintage also had removable receiver side plates for the G&H.(take it out of the stock and look)

The Redfield (current avg about$300) works fine and looks decent,though I do prefer a claw mount, but if it is not there ,the cost in placing one can be painful(yes, I got the T shirt)

The G&H works well as do other sidemounts.

There have been numerous mounting systems over the years, several different claws. Springer, Jaegers, Pachmyar, Stith, Williams, Leupold, Buehler, EAW, Recknagle ,etc,etc, I have owned 17 different MS rifles and carbines with 11 different mount types.

All of my guns have been good shooters with 2 being sub-MOA.

Do what works for you and you can afford ,the use the gun for a couple more generations ( I'm still shooting original 1903, 1910 etc)

DuggaBoy