Ninety-two-year-old whiskey - considered to be the world’s most expensive - will go on auction in Edinburg, United Kingdom, in October.

A bottle of Macallan Valerio Adami 1926 is estimated to reach between £700,000 and £900,000, or R13 to R16.8 million, at the Bonhams Whisky Sale on 3 October.

The whisky was in a vat for 60 years from 1926 before being bottled.

Pop artists Peter Blake and Valerio Adami were commissioned by Macallan to design labels for a limited edition of 24 bottles -12 Adami and 12 of Blake. 

It is held in a specially-commissioned cabinet, or tantalus.

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Bonhams whisky specialist Martin Green said the whiskey is considered the “holy grail of whiskey”.

"Its exceptional rarity and quality puts it in a league of its own, and the world's most serious whisky collectors will wait patiently for many years for a bottle to come onto the market,” Green said in a press release. 

“It is a great honour to be offering this amazingly rare whisky at our Edinburgh sale."

A bottle of The Macallan Valerio Adami 1926 was sold in May for a world-record-breaking price of £814,081, or R15,2 million, at Bonhams Hong Kong.

It is the most ever paid for a bottle of Scotch whisky at public auction.

It is believed that 12 bottles of The Macallan Valerio Adami 1926 were produced, but how many still exist is unknown.

"One is said to have been destroyed in an earthquake in Japan in 2011, and it is believed at least one of them has been opened and consumed," Bonhams said. 

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