S/N 9999Axxxxx

[Steve S]

There's an HP-67 calculator that just appeared on eBay with a serial number of 9999Axxxxx. Can someone remind me of the significance of the leading 9's?

[GE]

This unit is a prototype.

I just happen to have had 9999A00180 in my very own hands 2 hours ago, it belongs to a friend, and is a clear case back HP67 in mint condition.

Lucky guy !

[Matthias Wehrli]

Maybe proto... indeed the clear cases are not prototypes. I have some of them, got some of them from a man that worked in a moddeling firm from HP. These cases are more curiosities.

Matthias

[GE]

That machine was BOTH clear case back AND a prototype. It has a "HP67 - IL2" sticker (looks original and official) in place of the usual "Hewlett Packard 67", and was sold by high-rank official at HP who retired recently.

Personally, I'd like to have one of these just out of scarcity.