Tell me what to look for, and I���ll take as many hi-res pictures as you want.
I'm looking for the frequency printed on the oscillator/crystal.
Here is a picture with several examples:
https://en.wikipedia.org/wiki/File:Crystal_Packages.jpg
The row of Oscillators is most likely. They also come in plastic packages.
You will probably be able to see that they have 2 or 4 connections. They
will probably be quite a bit thicker than normal surface mount plastic
packages.
Likely numbers are 166, 166.6 or an integer any sub multiple. 41.5 or 41.65
is a good possibility.
--
These are my opinions. I hate spam.