Unfortunately it didn't work on my Mk2 F. Its lost 40 minutes overnight.
Had the same problem with my mk2 F I had to buy a replacement clock.It's done the trick the times been spot on for the last two and a half years.
If you change it make sure you get the right one, tf and mk1 clocks are different wiring I believe.
Got the ame problem here , got a second clock to solve the problem but it has the same.
Is there a fix for this problem .
Disconecting and waiting around for the right time and connecting it again is no option for me .