[ROVERNET - UK] Kienzle clock regulation

[geffandjulie]

My clock works in the car but loses minutes a week. I have the instrument 
binnacle out, and have hooked up 12V DC to the male connector and case 
ground. I measure 14v across, yet the clock seems not to work. I have hooked 
up a spare clock in parallel, and it also does not work, tho' I cannot 
verify that it worked before.Ideas please.
Also, is it worth 'overhauling' these old clocks?  Nobody here in Portland 
OR has the capabilities, I think.
Geff and Julie McCarthy
AvMedSafe
503-241-8468