Check out the Rakon website www.rakon.co.nz and you will see pictures of what the Oscillators look like. I suppose the easiest way to make a good guess if a product conatains a Rakon part is to look for the 'R' on the top Oscillator.
I have no assoctiation with Rakon but have been the the local electronics industry for about 30 years, 26 of those selling electronic components to the local industry. In those days, Rakon was one of my customers.