The present reference 3466 is a fine example of the screw back "Calatrava" model. Recently serviced in the workshops at Patek Philippe it impresses with its very attractive overall condition, still retaining the International Customer Service sticker to the case back.
Reference 3466, the water-resistant-type Calatrava with screw back, was in production from 1962 until around 1970. It was available exclusively in stainless steel and fitted with the celebrated automatic calibre 27-460.
Reference 3466 is published in Patek Philippe Steel Watches by John Goldberger, pp. 354 – 357.