I saw a HP-48SX at flea market and I couldn't resist.

[walter b]

(05-21-2014 02:20 PM)jebem Wrote:  I just found another small pencil annotation like this: "315usd x 130$00 = 41000$00 [Dez 990]" on the second page.
So apparently this calculator was bought in the USA and the cost was 315 USD in 1990 (equivalent to 41000 Escudos in the old Portuguese currency used before the Euro took over). Could it be right?

Please look here (remember this forum is located in a museum).

It may be possible to guess the profession of the previous owner of your calculator since his calculation is neither precise nor are the units correct.

d:-)