I'm adding one more somewhat educated guess here after measuring quite a few SF lenses.
I don't own a P&S I or III but my II (#1024) is hand adjusted. The rear element of my P&S out-of-series (#902) is "hand adjusted". My series IV 2b is not hand adjusted. I didn't measure my eidoscopes or PS945 yet but will do so when access to equipment allows.
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