It's likely a Prugnat lugset. The dent in the chain stay for chain line and the fork crown suggest a more budget frame. The weight will give it away. If it's over 2700Gr frame and fork likely budget Columbus or Reynolds plain gauge.
Mystery solved. It's a RIH.
@ColnagoDaft started
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It's likely a Prugnat lugset. The dent in the chain stay for chain line and the fork crown suggest a more budget frame. The weight will give it away. If it's over 2700Gr frame and fork likely budget Columbus or Reynolds plain gauge.