The Pearlmaster 39 was equipped with a new generation 3235, fully developed and manufactured by Rolex, for high performance. After being authenticated as a Swiss chronometer by the Swiss Institute for the Chronometer Test, it was tested again from Rolex after its installation to ensure that its daily use is consistent with Rolex standards of precision, which is twice the strictness of the standards imposed on formally certified chronometers. To complete this final precision check, applied to the clock, a special methodology and advanced technological equipment is used, specially developed by Rolex.