Question about Apple MacBook Pro Retina

The question about the processor clock is answered in the specifications; it is indeed a model with a 2.7GHz base processor clock.

Nothing is mentioned about the RAM other than the amount, but if you follow the link to the manufacturer's specifications, you can see that the RAM clock of all three 13-inch variants is 1866MHz. (The only question is what the CAS timings are, but of course they are not listed anywhere).

You will find the information in the specifications under Processor clock frequency. It is 2.7 GHz.

With 1867 MHz you probably mean the graphics card or the RAM? You can find information about the graphics card - it is an Intel Iris Graphics 6100 - it is around 1100MHz.
There is no detailed information about the RAM in the specifications - but Digitec often provides external links in the specifications. Also for this product: http://www.apple.com/de... - it would be 1866 MHz for the 13'' Retina.