1968-2026 1 Francs should be 23.2mm dia., weight 4.40g.. The rim and design details do not look correct. Date not centered under 1 Fr. Not sure what you have but does not look like a genuine Swiss made franc.
Additional information: the coin is very light, approximately half the thickness of a Swiss 1/2 Franc coin, and has a completely smooth edge. I also found the inscription "A.G. SIGG" on it.
Could this be a SIGG play money token rather than a genuine Swiss Franc?
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