Breitling Venus Rose Gold Chronograph

Movement signed "Leon Sain Swiss" on the center bridge and the Venus trademark is on the balance bridge  

Circa 1940's

Case: 36.5 mm, 18k rose gold, snap back, inner metal dust cap

Dial: rose, Arabic numerals, 45 minute register at 12, sub seconds at 6, blued steel feuille hands

Movement: Venus caliber 170, manual winding, 17 jewels, nickel finished lever