a) You don't need a 'scope to build/calibrate the '440. THere is a 1V/OCT trim, if you set it to the center you will be within 10% tracking, and then set by ear (at self-resonance).
b) No CEM/SSM synth ICs are used in the current modules. The ancient and highly collectible MOTM-110 did use a CEM3330, but that was the only one (replaced by the MOTM-190). The SSM2210/2220 parts that ARE used are not "synth ICs", they are just 2 transistors in a package that ∗looks∗ like an IC and are in current production by Analog Devices.
Paul S.