Sinclair Sovereign Calculator black - in box + case + operating instructions

Sinclair Cambridge Programmable Calculator with Original Box, Receipt and More.

Vintage Sinclair Scientific Calculator w/ Case

Sinclair Cambridge Calculator With Original Case - Black Working 1970s Vintage

Vintage 1973 Sinclair Cambridge Calculator With Memory Function Red

VINTAGE SINCLAIR CAMBRIDGE POCKET CALCULATOR WITH ORIGINAL PLASTIC CASE WORKING

Sinclair Scientific Calculator

Rare Sinclair Cambridge Programmable Calculator. Working - see description