So this may be an ignorant simpleton type question, but how do I get this off? The two small depressions seem too flimsy to be it, and I haven't seen a tool that would fit, so that's gotta be access to the innards, right? Is it two chainwhips, one on a rear cog and another on a front one and turn the front one counter clockwise?
7 speed freewheel, Suntour Japan. It's on an old Bianchi Eros (Japan). Everything seems to be Suntour Radius stuff, the shifters are on the downtube, front is micro-ratcheting friction type, rear is indexed, marked Radius Accushift Plus.
7 speed freewheel, 13 tooth to 23 tooth. Marked Suntour Japan



Closer view