[zmann]

Also if you take a good look of the genuine PCB rev B and rev C ... there are differences.

Never seen any pcb of revison D ... but might be that new ones that has possibility to connect the bluetooth module addon.

Revision A most of them are by my old ones ... which have a square box casing.

My oppinion is that reference serial is not so important at all ... at least I think diagbox software doesn't car about it. It is checking the VCI serial number.

Thanks for the comment. I always find those etched printings indicate the hw revison as A or B too. But my notice on the first post says the 'ink mark' usually blue and red on the genuine PCBs which usually on the square box of B and C, also found them on your next post photo too.