To backup my statement b) above, I edited Piotr's pic (sorry, it became bit big):
Green and
cyan are the obvious connections to the quartz crystal (Xc), and usually these are the only osciallator connections.
The Trimmer, as well as C1, is conncted to
GND (V-) with one terminal, and to the Xc with the other, as usual in a Pierce oscillator.
There appears to be no connection of Rx and Ry to the oscillator circuitry OUTSIDE the chip - maybe inside, but at least for Ry I doubt this. Piotr's friend called it a "pull-up +Uz" - I don't know exactly what he means with +Uz, but Ry does look like a pullup for the reed switches.
BTW Piotr's friend gave names to voltages and components, so I'm sure he also made a circuit diagram. It would prove helpful!
So IF I'm right with the assumption the neither Rx nor Ry are part of the oscillator, then the question whether they are for temperature compensation or not is a moot point...