patriotically for the Queen's Silver Jubilee in
1977, the Sinclair Sovereign was an attempt
to break out of the bottom end of the calculator
market and recapture the top end. It was one of
the better-engineed Sinclair calculators and was
very well-designed - so much so, in fact, that
Sinclair designer John Pemberton won a Design
Council Award for it. It was available in a satin
chrome finish or plated in silver or gold. A few
limited edition silver Sovereigns inscribed to
commemorate the Silver Jubilee were also produced.
Sinclair even produced two in solid gold!
Sinclair's critical success
was, however, not replicated in the marketplace,
as the company was by that time on the verge of
being squeezed out by LCD calculators. Profit
margins became so slim that Sinclair was soon
selling the Sovereign at a loss.