The Caliber 3235 is actually not a completely new movement. Instead, it is a new generation movement. it continues to build on the already existing 3135 movement.    

The Rolex Caliber 3235 was officially released at Baselworld 2015

Rolex has replaced more than 90% of the parts of the prior caliber the 3135. In the new design of the 3235

Rolex’s criteria as a Superlative Chronometer is twice as exact as COSC, which means that means tolerance of just -2/+2 seconds a day.

The new train wheels of the 3235
Click spring and barrell arbor
The most important and significant innovation of the 3235 is the new Chronergy escapemen
The escapement is consists of two main components, a pallet fork, and an escape wheel.
Another new part in the caliber 3235 is the parachrom bleu hairspring.

The hairspring is made in an alloy of niobium and zirconium. It is insensitive to magnetic fields and temperature variations.
Updated date assembly
The 3235 has improved the power reserve from 40-48 hours to three days. The oscillating weigh is now supported by ball bearings.

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