The "pre-Must'' Cartier Tank Organic refs. https://www.crwmontres.com/Collection/tank/ 20611 (medium) and 21611( jumbo) https://www.crwmontres.com/Collection/santos-de-cartier/ were produced in the mid-'70s by both https://www.crwwatches.to/Collection/ballon-de-cartier/ Cartier London and Cartier New York in a rare Brazilian rosewood known as Palissandre De Rio. The watch had wooden side panels and a matching-grained wood dial with a plated yellow gold case, gold Roman numeral hour markers, and gold epee hands.