[Q] Understand Product Code & Sales Code - Galaxy Ace S5830 General

Hi, that's my history...
I've bought a S5830 branded (Orange) Spain.
I update it with Odin using an unbranded firmware from android 2.2.1 to android 2.3.3 (First factory defaults)
samfirmware
S5830XWKPKN ##
CSC - S5830OXXKP7
2.3.3
2011 July 13
Original
-------
Android 2.2.1
PDA:KE3 / PHONE:KD1 / CSC:KC3 (AMN)
PDA: S5830BVKE3
PHONE: S5830BVKD1
CSC: S5830AMNKC3
New
----
Android 2.3.3
PDA:KPN / PHONE:KP6 / CSC:KP7 (FOP)
PDA: S5830XWKPN
PHONE: S5830XWKP6
CSC: S5830OXXKP7
After flashing, i change my Sales Code from (AMN) (Orange) to FOP (Unbranded Spain) (Now i can upgrade using kies, but today there is not android 2.3.4 for unbranded S5830 to Spain)
Yesterday i checked my Product Code (*2767*4387264636#) and says:
GT-S5830RWAFOP
Could anyone explain to me what is RWA in the Product Code?
It's the country for which it was made the S5830?
FOP (Unbranded Spain) is the Sales Code (CSC) (Country Specific Code)
I've checked in Check Fus 2.0:
Model: GT-S5830
Spain
Product Code: GT-S5830OKAFOP
Version: Android 2.3.3
HIDSWVER: S5830XWKPN/S5830OXXKP7/S5830XWKP6/S5830XWKPN
It's wrong my Product Code? (France no Spain)?
It should be GT-S5830OKAFOP?
By the other side i've found this:
France (Bouygues)
Product Code: GT-S5830RWABOG
HIDSWVER: S5830POKC1/S5830BOGKC1/S5830XXKB1/S5830POKC1
France (Orange)
Product Code: GT-S5830RWAFTM
HIDSWVER: S5830BVKE3/S5830FTMKD1/S5830BVKD1/S5830BVKE3
So that's all, thanks for reading.