Mid-20th century gold and platinum retro ring, signed Cartier London, c.1945, of bold 'machine age' design,

Mid-20th century gold and platinum retro ring, signed Cartier London, c.1945, of bold 'machine age' design,
Price: £10,000-£20,000
Ref No. 06073
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Description
the square platinum head raised above yellow gold ribbed shoulders of square section, tapering to shank back, inscribed to shank back side 'Cartier London'
Square head 10.5 x 10.5mm
Length along head 1.8cm / ''
Weight: 19g
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