I have one of those controllers that have a "H" on it - and it came with my SCPH-77006 PS2 (As part of the stock PS2 bundle offered by Sony).
Originally Posted by lesnar1234
I also have one of those with an "A" on it (I bought it as a 2nd controller in 2007, the day after I got my SCPH-77006 console) - but I didn't notice any difference in sensitivity for the analog sticks.
The only difference between the two is that the "A" controller had a transparent yellow casing.
SCPH-10000 S. MINOKAMO v1.01 (Defunct)
SCPH-10000 S. KISARAZU v1.00 (faulty)
SCPH-15000 S. KOHDA (With warranty seal!) :D
DESR-5100 S. EMCS