Tuning Fork Clock JECO.CO Japan SMITH CLOCK..

I have one of these but its very erratic for the movement to turn, Fork does vibrate and the drive transistor is saturating, I also gave the mech a good clean.

This is the cheaper plastic gear mech..

I have a feeling that it gets demagnetized with use, as the tuning fork has magnetic ends riveted to it..

Any clues..

Video link

Clock histroy

Patent Info

Thanks