Sorry Bushy I know this post is about 10 months old I guess I missed it due to my time away,but yes you are correct.Your mower is indeed a 1973-74 VC-160 Auto Drive Mark II V136.If it has the original engine the number should start with 10673 or 10674 depending on year of manufacture.This was the only model that had the chrome hub caps and the only one in this colour scheme that run the G3 carby.
As for price or worth?Well as you know they are more a collectible now and not a user mower,and condition is everything.There was one just recently sold in Melbourne and it was in absolute beautiful condition.I myself had problems on not purchasing it.It was also a Mark II.
It sold for $99.90.A bit of a surprise as I thought it would get more,if I was going to bid I was going to go way over that.I just had a freight issue that I would have had to deal with as well.That's why I didn't. So I guess if that sold for that much I'm not sure yours would fetch that amount,but how many people in your area are after one?That's of-course if you still have it.