ECU 951 stickers: "CKCK" vs "CC" what's the diff?

[Bigscreen Bob]

Some Bosch ecu 951's have "CKCK" in large letters on the front sticker; others have "CC".

Do these mean anything relating to the functioning of the computers? Or is it just a German-made versus Spanish-made thing...or what?

[frpe82]

Some Bosch ecu 951's have "CKCK" in large letters on the front sticker; others have "CC".

Do these mean anything relating to the functioning of the computers? Or is it just a German-made versus Spanish-made thing...or what?
It only have to do with where they are made. Nothing else.

[Bigscreen Bob]

Thanks!