HP-49G scientific graphic calculator

The last native Saturn processor based machine, running at 4MHz, with 512KByte of SRAM, introducing flash-able firmware for the first time on HP calculators by using a 2MByte Flash ROM, and featuring symbolic calculus (CAS).

Initial production batches had a few hardware issues, later corrected.
The famous rainbow effect is present on my calculator, serial number: ID934.... (Indonesia, 1999, week 34).

One nice touch are the blue colored annunciators: