Hi Jonno1,
You definitely have to check the number on the back.
The 08.480.816, the units with the 3 bridges + separate ring with 3 holes that you have, were changed in august 1969 for the 08.481.816, that are the ones that you can see in post # 9 and #10
In my opinion, both the glasses of the 480 and 481 units would have the same number: # 08.480.700
The 08.481.816 units can't be mounted straight away on your car because of your 480 buckets, so be aware that when buying the 08.481.816, you have to change also other parts on the car.
Be happy that you have the old system with 'back number' 480, that is a rather universal fixing method, the 481 is specific for Alfa.
Therefore don't trow your old units away, maybe you will need to recuperate the RHD 08 prefix glasses to glue them in new repro reflectors that have the 3 bridges system.
I'm even not sure that 08 units are reproduced.
If you go for the units in post 1, that would be possible as they have the same system with the 3 bridges like yours.
Normally thy are expensive (( Ferrari stuff !) Check the prefix 08. The 07 prefix is for LHD
As already mentioned in other posts Indeed you need to adapt here the wiring and the connectors, and (!) they should be used with a relais !!
Rgds,
Thierry