A lady's gem-set 'St Petersburg' Tank Allongée gold wristwatch, by Cartier

A lady's gem-set 'St Petersburg' Tank Allongée gold wristwatch, by Cartier, c.1970, the mini tank allongée wristwatch designed with a rectangular engine-turned dial within buff-top sapphire sides, the square-shaped ruby and circular-cut emerald and sapphire bracelet with diamond detail and deployant clasp, quartz movement, calibre 028, numbered 280. 002, case 15mm, signed Cartier Paris, French control marks, numbered 663595

Only 10 examples of this watch are believed to have been manufactured.

Accompanied by an insurance valuation from Cartier dated 2011.

Accompanied by a receipt for servicing from Cartier dated 24 October 2018.