DaveC
There are no caps in this oscillator circuit. The resonator has a 33 ohm (or
22; I can't tell if those are red or orange stripes) resistor connecting each
of its 2 pins to ground.

That really really really sounds like 33 pF caps to me. Are those "resistors"
the same color as the other resistors on the PCB?

--
All relevant people are pertinent.
All rude people are impertinent.
Therefore, no rude people are relevant.
-- Solomon W. Golomb