International fine watch auctioneers Patrizzi & Co will host a live online auction on Monday December 14, based in New York City.
Ninety-three collectors' watches, clocks and accessories will feature; including Patek Philippe, A Lange & Sohne and Vacheron Constantin among others.
Leading lights of the sale include a Patek Philippe Ref. 2499 Second Series, with bidding opening at $650,000 and a top estimate of $850,000.
The Ref. 2499 is one of the most sought-after Patek Philippe models. Launched in 1951, fewer than 10 were produced each year until its production ceased in 1985.
A White Gold Patek Philippe Geneve, consigned by New York Mets baseball great Lenny Dykstra, will also go under the hammer with a starting price of $28,000 (top estimate: $35,000).
Incidentally, for sports memorabilia fans, Dykstra's 1986 World Series Trophy will also feature in the sale, with bids opening at $17,500 (estimated at $18,000-25,000).
Bids on a "Pour Le Mérite" Tourbograph by A Lange and Sohne are set to open at $400,000 (top estimate $500,000).
Created to mark the 15th anniversary of the re-established Lange manufactory in 2005, it is the first wristwatch in history to combine a fusee and chain with a tourbillon.
Another Patek Philippe, the Ref. 5075, will also make an appearance.
In 2000, Patek Philippe launched a special set of four "Calatrava" wristwatches with hand-made cloisonné enamel dials.
Since then, the company has produced 10 sets of four watches each year - though this is believed to be the first ever Ref. 5075 to be sold individually on the market, rather than as a set of four.
It has a starting bid of $35,000 (top estimate: $50,000).
Another unique highlight is the largest wrist minute repeater ever made by Vacheron Constantin, a Minute Repeater made in 1941.
Carrying an estimate of $180,000-$220,000, the watch has a very rare 14 lignes repeater movement, previously only used in pendant watches circa 1910.
The Minute Repeater is one of only five examples ever made - although a few pedant quarter repeating watches of the same caliber also exist.
Patrizzi & Co will not charge buyer's commission for the sales.
In other fine watches news, watch this space for an update on 2009's final Antiquorum sale in New York City, featuring a number of rare Patek Philippe sales.
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Images: Patrizzi & Co