Sinclair Sovereign

Pity that these are virtually useless nowadays (the average mobile phone can perform more complicatred calculations than this thing) but aren't they beautiful? Sinclair Sovereign, calculators designed in 1977, was available in a satin chrome finish or... plated in silver or gold.




Source:
http://www.nvg.ntnu.no/sinclair/calculators/sovereign.htm
http://www.boingboing.net/2009/10/08/sinclair-sovereign.html