Omega 123.20.27.20.55.005
Omega, Model: 123.20.27.20.55.005, Series: Constellation, Movement Type: Automatic Mechanical, Diameter: 27mm, Ladies' Watch, Technical Certification: Swiss Observatory Certification, Case Material: 18k gold/stainless steel, Dial material: Mother-of-Pearl, diamond-encrusted hour markers, set with 11 diamonds.