Jonathan,
If I'm looking at pictures of the right boat,
then I don't think it can be hull #1222. My reason for saying this is
my boat, a 1971 Series I Vega, has a higher number: #1331.
The boat in the pictures is definately a later Series II Vega (1974
according to the ad), as it has recessed cockpit locker latches and
an aluminum-coloured mast with the roller reefing handle that sticks
out of the forward face of the mast.
My Series I has a gold-coloured mast with the reefing handle attached
to the boom, and non-recessed cockpit locker latches. The recessed
gauge area and traveller track also indicate a Series II boat.
Hmmmm, I could be wrong (it's happened twice this week already) and
would be interested to know what more knowledgeable members of the
forum come up with!
Another mystery to solve

Peter
#1331 'Sin Tacha'