Unusual mid 1980's Cinelli 1 Bolt Seat Post 27.2 mm x 215 mm.

Vintage seat post in fair condition considering the age, circa 1980's. 

With patina and insertion scratches from a rough frame seat tube, see pictures. 

Note the original position set screw had to be extracted, the shaft was rethreaded to 5 x 0.8 mm and fitted with a 

stainless steel screw.