My Peugeots have (or had) the 531 decals on both sides of the fork. Model years 67,72, and I really can't tell on the 73. My Lejuene has the 531 decal (what's left of it) on one side only (the other may have completely disintegrated). Who knows?
The decals on the 67 are a markedly different colour on the "531". Colour might have been different or the colour was fugitive.
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