Helyett was taken over by Gitane somewhere in the 60ies. Gitane kept offering Helyett-branded bikes during most of the 70ies, these were regular Gitanes with Helyett stickers, often with the Gitane-logo engraved in the fork crown. The red one in the pic could be a Nation in disguise, with a handbuilt all-Reynolds db frame (from around 1978). Rides like a French dream!