Unknown Lawnmower Shop Tools-Maybe Foley-Belsaw Saw Blade Sharpening Angle Gauge

Description

Vintage Unknown Tools.
MIGHT BE Foley-Belsaw Saw or Blade Filer Sharpening gauges?
I have no idea what these are used for.
I obtained these from a Lawn mower and Reel/saw sharpening shop that closed, that
was big into Wisconsin Robin engines and Foley-Belsaw.
I posted the pics in some tool forums and asked what they are;
The best reply I received was:
"but those dials look like those used by Foley Belsaw"
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