Which master cylinder for 205 1.4i from 1998?

[farkash7 0]

Hi. Master cylinder in my car was replaced in the past because of a leak. The car brakes works poorly, I went to some old guy that deals only with brakes and servos and he told me he thinks that my master cylinder diameter is incorrect, according to him it's suppose to be 19" or 20", but mine is bigger... and this is why my car stops like s*it (Servo don't work with with it properly from what he explained).

He told me he will try to order the right part, but I wonder if you know which diameter I need for my car? I know Peugeot used many parts over the years. I know my car has a bendix system in the rear drums if it counts.
I attached VIN number not sure if it helps...

[Ozymandis 103]

If it has solid front discs, 32mm wide rear brake shoes and a servo, it should be a 19mm master cylinder.

 

If it has vented front discs, 42mm wide rear brake shoes and a servo, it should be a 20mm master cylinder.