Silver Edition - what's new?
Calculator versions
HP-10Cbasic scientific calculator $801982-84
HP-11Cmid-range scientific calculator $1351981-89
HP-12Cbusiness/financial calculator $1501981-present
HP-15Cadvanced scientific calculator $1351982-89 ($100-$180 in 2011)
HP-16Ccomputer programmer's calculator$1501982-89

Reference: Wikipedia
11-Nov-2014release of the SwissMicros Firmware Update Tool as an EXE or zipped
13-Feb-2014Firmware Version 16.0 released
26-Nov-2012new Silver Edition is available
26-Nov-2012new website goes live
19-Nov-2012Silver Edition calculators to be released 26-Nov-2012
14-Sep-2012currency converter added to the order page
27-Aug-2012We're on wikipedia
Anodizing Titanium information anodizing information is about aluminium, but a good illustraion of colour interferences

The colors produced by anodizing titanium are formed by the refraction of light off of and through the thin titanium oxide layer that is produced. These colors are called interference colors. There are no pigments or dyes involved. In this process, the clear micronic oxide layer (TiO2) that normally envelopes titanium (leaving the metal a gray color) is electrically thickened by a very small amount. This clear oxide filters out light waves, producing brilliant colors. creating different refractive effects which the human eye perceives as different colors. By controlling the application of electric currents and voltages in different intensities and duration bring about the different resulting colors, across the rainbow spectrum.

When the oxide is of a thickness to generate interference colors, its depth is measured in angstroms (1Å=10-10m). This layer can vary in thickness from 500Å to 1,000Å+ depending on the color. It is not the oxide itself that is perceived by the viewer, but its effect on light waves.

Because colors are optically created you can see subtle differences in the amount and/or shade of color from morning to twilight hours of the day. The angle of viewing, and type of light source will also influence color. The colors also change if the surface is wet or greasy.
Differences to the original

proof of concept
July 2011

first prototype
September 2011

production sample
December 2011