Rolex's calibre 3235, the date-only successor to the long-serving 3135, has what official power reserve?

The story behind it

Almost half of the gain came from the Chronergy escapement, Rolex's more efficient redesign of the Swiss lever escapement; the rest came from a higher-capacity barrel with a longer mainspring. The same roughly 70-hour figure now runs across the family, including the no-date 3230 in the Submariner and the 36 mm Explorer 124270.