[FRANKINAUS]

Thats the noise my speedometer makes after I drive for a while
used to do it at 100KPH now at 40KPH any ideas?
Thanks Frank

 

[Marcos]

I think it's a mating call... Have you noticed suspicious Saabs driving around your house, kinda lingering for no reason?

Or a bushing in the clock itself has gone and a shaft is vibrating in it... only a matter of time to self destruction unless taken care of.

Personally, I like the mating call explanation better.