Patek 5135

Patek uses an all new movement (caliber 324) in it’s new Gondolo Calendrio. Main improvements and modifications to this movement in comparision to other calibers are: higher beat rate ( 28.800 i.s.o. 21.600), new (4 spoke, 4 maselots i.s.o. 2 spoke, 8 maselots) Gyromax balance wheel, advances in wheel toothing geometry for higher rate accuracy.

Here’s the whole article: New Gondolo Calendario 5135

Gerard Nijenbrinks

Gerard Nijenbrinks

Gerard has been in the watch industry for over two decades now. He runs an on-line watch shop from The Hague, The Netherlands, and besides that he has journalistic and photographic activities in the field of watches. Collecting watches since he was six years old (true!) and triggered by a friend, he bought his first 'real' watch in the late eighties; an Omega Speedmaster Professional with glass back. This was the first watch of a nice, even today ever growing, collection.
Gerard Nijenbrinks
  • ANDRE MOSCONI

    Good afternoon, I have a pocket clock pat.13 year 1891 I number 171009 chronometro gondolo – he would like to know of it really was manufactured in the year of 1891? It was of my great-grandfather. grateful. which would be the price of it of market?