HP 12c 30th anniversary model ? get one or not ?

[jebem]

(07-18-2014 05:46 PM)rprosperi Wrote:  

(07-18-2014 04:55 PM)Dave Frederickson Wrote:  So how many different versions of the 12C are there?

There are at least 8 or 9 different versions (...)

And if I'm not mistaken from what I have read and saw today in old published text and pictures, there at least three different firmware releases:
RPN mode only, RPN and Algebraic without and with parenthesis.

According to this old post from 2006 by Luiz Vieira from Brazil, it is not only the Algebraic capacity enabled in some models, HP did implement Backspace and Undo in some of the models:

Model Operation Mem prgm CashFlow Extras
--------------------------------------------------------------------------
HP12C Gold RPN 99 stp 21
HP12C Platinum (first) RPN+ALG 399 stp 31
HP12C Platinum (second) RPN+ALG 399 stp 81 ( ) [<-] undo
HP12C Plat 25th. aniv. RPN+ALG 399 stp 81 ( ) [<-] undo
HP12C Prestige RPN+ALG 399 stp 81 ( ) [<-] undo
---------------------------------------------------------------------------

In the above list, the obvious model missing is the 30th Anniversary.
As I see from this model pictures, it is only RPN as the parenthesis are missing.