Is this 12C HP is a true and original ?

[burkhard]

It's real. If someone were going to be faking Voyager calculators, they would not pick the one that is wildly abundant and incredibly cheap to buy in the used market. There are presently over 600 for sale (in varied vintages) on the US eBay site. You can frequently get decent ones for under $20 including shipping.

Somebody else mentioned something about algebraic entry on the current models. That's only on the 12C "Platinum", not the regular 12C. The regular 12C is (I think) functionally identical with the one from 35 years ago. By "functionally identical", I mean in terms of operation. The internal architecture is completely different and the keys are for sure lower quality (printed, rather than molded labels). On the plus side, though, the new ones are a ton faster.

So, choose your favorite 12C or get one of each. They are all cheap. Considering that the "15C Limited Edition" is really a modern 12C with different firmware and key-printing, it's a pity HP didn't make a whole lot more of them. And maybe some 16Cs as well. Why not?

burkhard