Hi Kirky2 not sure what year you were going off but from my knowledge it is an original Cortina engine that's the 1 in front of the 70.The 70 is in fact the year of manufacture,so it's from 1970 with a 125cc engine with no decompressor.It should have had a G2 carby as the original,my guess is it won't have now.
There were 4 models of this model,(I know that sounds silly)They run from 1969 to 1972.
Models were.
69VE-1-2-3 1969-70
69VE 1970 1969-70
70VE 1970-72
71VE 1970-72 all run the same victacode V63.
There were very little differences between each model more to do with dates and different part numbers.I can't find anything different's in there physical appearance,and the fact that Victa changed the part numbers for the bases.It's probably just things like (and I have seen this before) extra ribs in the base to strengthen it.It's possible that's why there are 4 models.Yours really could be any one of those 4 as they all covered 1970.
I hope that helps you with the identifying of your mower.
