18k gold chronograph

1950s chronograph with oversized 18k (750/°°) rose gold case. Rose gold caseback closed by pressure. Original silver-colored dial, with a beautiful and uniform patina of time, exceptionally preserved and perfectly functioning as a watch and as a revised chronograph. Watch in exceptional overall condition, original in every part. Period: presumably 1950s Case: in 18k (750/°°) rose gold with beautiful lugs. Caseback tightened by pressure, while internally we find the hallmarks of 18k gold (750/°°) - case maker's hallmark - Minerva head hallmark to distinguish 18k gold case of Swiss production. Rectangular buttons. Case dimensions: diameter 40 mm (including crown) Dial: original silver color, with a beautiful and uniform patina of time with black printed graphics, external tachymeter scale. Movement: manual winding mechanical, 17 jewels, well preserved and perfectly functioning as a watch and as a chronograph.