Which crystal does the SPSGRFC-868 module come with?

[Wintersteiger]

Rather informally, in Fig 1, the datasheet of the SPSGRFC module indicates the the module comes with a 50 MHz crystal. However, the SPIRIT1 datasheet clearly states "The allowed clock signal frequency is either 24, 26, 48, or 52 MHz". So, does it indeed come with a 50 MHz crystal or is it really a 52 MHz crystal?