IBM Model M Defective?

[y11971alex]

I was selling a Model M the other day, with a picture of the QC sticker posted on the listing.

A buyer asked me, why the "Card to Base" field was unsigned. I looked at the actual keyboard, and it indeed was blank.

Then I checked my Model F... Card to Base was signed.



Does this make the M some sort of a defective product? I'm feeling a little wonky, since the buyer bought it anyway, with the signature unaccounted for.

[shreebles]

Is it possible that the ink faded over time?

[chzel]

Could the signature be the H looking scribble?

[terrycherry]

It's nothing important. See this thread first.
keyboards-f2/ibm-shop-date-t13443.html

[y11971alex]

Could the signature be the H looking scribble?

That photo is actually one of the Model F XT. I don't have the photo of the M handy.