Antique tool identification

[wfb1956]

I found these two gizmos in my grandfather's tool box and can't imagine what they are or what they are used for.  Any and all wisdom appreciated - thanks in advance!the 'flap' can go up or downtape says "founders tool"

[dogchow747 · Accepted solution]

Might be a angle tool for a manual wood plane?

Planing wood planks at a fixed angle?

Second...

Could it be a contour gauge tool of some sort?

Like a master pattern?

I know a little about metal working,

Not as much on wood.

I will look around an see what I can find.

[tony1963]

This is a timing belt alignment tool for both the cam and balance shaft belts on the Volvo 16-valve engine found in many late 80s era GLE models.

Very rare.