My 7C43-7010 landed today It is well kept and all original - including signs of use ... just as I like it to be I just noticed an extra number on the caseback - where the "Battery change" text is. It reads: B0412 What does this number tell ?
Yours is not alone..Here's a couple of examples of similar casebacks from pictures I had saved on my hard drive. Not sure of the significance of the numbers. They aren't my pictures but ones that I had saved for one reason or another.