Early HP-80 number keys and front label



#2

I recently acquired an early HP-80 that has a raised nipple on the 5-key. The legends on the lower four rows of keys are also less bold than those on later models. The front HP label does not contain the '80' designation.

Does anyone know when the raised nipple and less-bold keys were discontinued? Also, when was the '80' designation added to the front label?

Thx for any info or leads.

Steve


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