Vintage architect's lamp around 1970

Authentic industrial lamp of architect perfectly functional, around 1970. Annular neon lighting, telescopic articulated arm, fastening type clamp for mounting on support thickness max 6cm. To turn it on, no choke but a button 3 positions including one for the priming of the neon. Ideal for an industrial decoration, or utilitarian as at its origin. Made of metal hammered gray color. Dimensions: 82 cm unfolded, 18 cm for the transformer block.