I love you guys!

Thanks and once again, a thousand internets be upon you.

What does "5a" means?

It will work with a 1200. Use the stock manifold. All you need is the 32/36 adapter plate and a bracket for the throttle cable.

dgv-5a -manaul cable choke operation
dgev -electric choke operation
dgav -water temp choke operation

32/36 - 32mm primary throat throttle plate size - 36mm secondary throat throttle plate size

primary and secondary venturis are 24 and 28mm from memory.

any chance you could give me a hint as to what the letters actually mean, and will it fit my 1200?

There is a chance I can pick this up for a song, but if it doesnt fit, it will be a really expensive paper weight.

Oh, and what sort of manifold options will I be looking at (if it will fit)

32/36 dgev ? the carby id will be located on the base plate looking from the side.

looking more closely, im going with a 32/36 dgv-5a.

I dont suppose any of you weber experts could ID this carby for me just on these pics? And some advice on what I would need to make it fit a std late A12?

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Thanks DDGonzal.
Notes straight from the weber book I have;

"The prefix number on the DCOE, e.g., 40 DCOE, is the diameter of the throttle plate (the throttle bore) in mm; DC means doppio corpo (double throat); O means orizzontale (horizontal); E means it is a die cast carburetor; and the number or number and letter suffix is the variation type (e.g., 40 DCOE151). An example of a 40 DCOE"

The suffix I have is 13 - just another variation of the DCOE.

What are "DCOE 13’s"???

45 DCOE are fine for A12 good for 6400 RPM as long as jetted correctly (most important: use 32mm venturies, or 34mm for A12 GX engine)

On a "worked" A15 use 34 mm venturis
For a Sunday Drive A15 use 32 mm venturis
For a race A15 36 mm venturis might be OK, as long as you are keeping it revved up.

Click Carburetor Sizing

Thanks for the advice.
I will have a think about running the 45's on the A12. Only problem is i won't be getting 30 mile to the gallon anyone...

That's what i would of thought, around the 30 mm mark... I would contact a Carby specialist and book in a dyno tune if and when the engine is built that the carbs are going on.... Not cheap but definitely worth it.
I'm running a single 45 DCOE on my mild A12, seems to work OK with 30mm chokes in it, but im getting back firing out of the carb when blipping the accelerator changing down gears :S but that's a different story haha.