Decoding Victa serial number in this era is relatively straightforward compared with what came later.
We have here
464 15554
The first digit “4”,is the internal Victa model code in use at the time for that model.
The second two digits give the year, “64” being for 1964.
The other digits give the number made up to that point, so this was the 15554th mower made in that model.
