It's the deguass coil.
number 2: what is it? what can I adj with thus 2 pots???
Presumably you mean the LOPTX? (Line Output Transformer), the top one is the focus, and the bottom one the first anode - you shouldn't adjust ANYTHING unless you know what you're doing.
As Audioguru says, there are high voltages present, and it's no place for random 'fumbling' by complete amateurs.
From the picture, the set looks to be a Thomson chassis?, these are generally badly thought of and very unreliable sets.