[DonaldStott]

I've replaced the 4060 along with the 4.9152 MHz crystal just in case that was fried as well.

Rewired my Breadboard circuit with shorter leads and paying much more attention to detail (thanks Trigon) - everything oscillating nicely but not quite the stability I need.

Still some fluctuation (+ - 10-20 Hz) which I assume could be being caused by some back voltage?

Would some judiciously placed diodes help in this instance?

I'm just doing this for my own education and interest (or stubbornness!) as I've also acquired the QX14T50B4.915200B50TT to try out as recommended by Radio Wrangler.