Contact Marlin
Weaver
Scope mounts that mount on the left side of the receiver using the four screw holes are available from Weaver.
Marlin, Henry, Puma
50-350 USD or so
marlin 35 cal. lever action. rifle/ Marlin makes the rifle ,but not the ammo for it.
No. Yes they do: Marlin 917VS rifle
That gun was made by Marlin for Sears, and those holes are not factory. Someone has drilled and tapped it for (probably) a Weaver side-mount base.
your marlin rifle was made in 1957.
150 USD
Depending on condition, about the same as any Marlin 70 rifle.
Your Marlin rifle was made in the year 1987.