A group of 3 gold chronograph wristwatches

comprising: an 18k gold chronograph wristwatch with stepped bezel, 30-minute register and subsidiary seconds, Mundus, 1950s, diameter 35mm; an 18k pink gold chronograph wristwatch with 45-minute register and subsidiary seconds, 1950s, diameter 37mm; an 18k pink gold chronograph wristwatch with 45-minute register and subsidiary seconds, Perseo, 1950s, diameter 34mm. (3)