Beautiful vintage Patek Philippe Calatrava 18k Solid Gold in collector condition you can see the watch on YouTube: https://youtu.be/QCefAWfJJfA Movement: Patek Philippe cal. 23-300 ,with the hallmark of Geneva, hand wind ultra thin, gyromax balance, 18 jewels adjusted to temperatures and five positions "As the name implies, Cal. 23-300 is 23 mm (10 ligne) in diameter and 3 mm tall. This compact size made it ideal for the popular Patek Philippe Calatrava and similar smaller watches produced in the 1950's and 1960's. Cal. 23-300 is classic in layout, with a barrel bridge covering the ratchet and crown wheel, a curved center wheel bridge, and separate cocks for the fourth and escape wheel. It was derived from the preceding Cal. 10-200 but with many modifications. It is notable in that it is equipped with both an overcoil hairspring and a free-spring Gyromax balance, a combination not found in any other 10 ligne Patek Philippe movement. This movement is greatly respected today, with many saying it is one of the best hand-wound movements ever produced by Patek Philippe. Carlos Perez said it "represents both the technical and artistic peak of Patek's 10 ligne handwinds, as the 27-AM 400 was the peak of their 12 lignes." Original dial in very good condition, was never refurbished. Singed: Patek Philippe Genève Case in 18k/ 750 Solid Gold singned: Patek Philippe GENEVE Swiss 18k / 750 Watch size: 33 mm without crown, 34 mm with crown and 9 mm high 40 mm lug to lug Total weight with strap: 29,2 g The watch will be sent with travelbox and you will also get high quality wooden watch box which you can see on the photos Strap: high class black leather size 16 mm and 22,5 cm long Condition: please study the photos in order to see the condition of the watch it has just been serviced, it is in perfect working condition and keeps excellent time Watch is in very good condition Look at the pics, that tell more than 1000 words Please look at my other watches too.