HP 65 with two identical glod keys (f-1)

[Alevin]

Hi


I have just realized that my hp-65 has the same label in both gold shift keys. They work properly but instead of f and f-1 gold keys , the labels print are f-1 in both.

There is NO trace of being opened, the back label is pristine. Indeed all the calculator is pristine, it seems not being used ever. SN 1509A 02191


Hypotesis:

A home made repair substituing a broken f key for a f-1 found somewhere else, but it would have deteriorated the back label.

A factory repair would have remove the back label and substitued it with a new one, but.... are the factory technicians so blunger to miss the f key with a f-1?

Or just is a rare factory mistake on production line not detected by quality control? (or a defective item that was not comercialized nor destroyed but kept by some HP worker as a unique item)


Does anybody know about some similar bizarre singular mistake?


Best regards