Speeding fine metres off 100

Hi all,

I have gotten a speeding fine for going 69 in a 60 zone (I know, isn't a problem if you don't speed) and I'm happy to pay and accept my wrong doings. Only thing, the 100km sign is in the photo of the car I was driving.

Has anyone fought this and won? I'm probably just going to cop it and pay but I just find the whole situation funny as.