Circa early 1940's 18ct cased Patek Philippe 'Tegolino' reference 425 wrist watch, curved case with two tone silvered dial and subsidiary seconds dial. Purchased Bonhams 2003. Ref.425 was launched in 1934 with production ending in 1971 a very long life span of 37 years for a watch model. Along with the iconic Calatrava reference 96, the reference 425 is considered as one of the most popular vintage models by Patek Philippe.