I have the possibility to acquire a brand new c6 transmission, NOS. It has the following codes;
EOAP TA 105 B1A and EIFP HAPGDCG.
Can anyone tell me what this corresponds to, year, model etc.

There should be a small tag attached to the servo cover or pan bolt.

Give those numbers.

I doubt it is a "new" transmission.

probably an AOD/FIOD rather than a C6. A c6 has a large notch cutout of the pan as well as a vacuum modulator.If it were new,it would probably be due for new seals and gaskets at least.

I've found out that E0AP = 1980 trans originally for a light truck.
E1FP = 1981 trans exported/ destined for foreign market.

I'll try to find the metall plate next to the servo cover.

E0AP is a 1980 Ford Galaxie and I bet it's an AOD, not C6.

Can't be an AOD with those pump numbers. AOD pump bodies were E0AP-7A105-AA. C6 pump bodies after 1979 were E0AP-7A105-B1A.

http://mmerlinn.com/catalog/berry_bubble/fd_e0f/fde0f110.htm#default

http://imgur.com/a/Orzwc
The seller sent me these pictures, can you identify this transmission. To me it looks like a c6.

Definite C6. It looks like a 351W.

But far from new, is there a servo somewhere?

The numbers you gave in the original post confirm that it is a C6. No other transmission uses those numbers.

E0AP means 1980 originally light truck, or, Galaxie.
But does anyone know how to interpret 7A 105 B1A and the code that follows?

http://mmerlinn.tripod.com/trans/fdc4f/fbbfdc4f.htm#num for a partial explanation of Ford numbers.

Breakdown of 7A105-B1A:

7 = Transmission part
A105 = Front oil pump body
B = Specific part variety
1A = Design level

That trans is OLD. Screw in modulator,pressure port on the servo.Prob good for scrap value.

Probably a re-cased transmission, or at the minimum previously rebuilt. Has a 1980 and later pump which is long after screw in modulators disappeared from the production lines.