US

A copy of Ratzer’s 'Plan of the City of New York…' offered as part of a Doyle (26/21/15% buyer’s premium) sale in the spring left much to be desired.

Kashmir sapphires have acquired a near-legendary status, due to their lustrous cornflower colour, soft velvety texture and extreme rarity.

Over a dozen fine art dealers have joined The Art Dealers Association of America (ADAA) in one of the largest new member classes in the organisation’s history.

'Hunters and Dogs in the Park at Silkwood House, 1886', is an oil on canvas by British equestrian painter Edward Benjamin Herberte (1857-93).

The opening lot in Hake’s June 29-30 auction Pennsylvania, is a 1767 promissory note hand-signed by a prominent Virginia slave owner – George Washington.

In 1820 the then US Secretary of State John Quincy Adams commissioned William J Stone to produce a facsimile of the original 'Declaration of Independence'.

Thomaston Place Auction Galleries in Maine kicks off its summer season with a three-day sale from July 9-11 and the return of live in-house bidding.

The Premier & Emporium Auctions at Brunk on July 9-10 include this large late Victorian silver tray with a shell and scroll border.

Richly illuminated manuscripts from a ‘truly exceptional collection’ shine in New York

Christie’s New York rooms is holding an online sale titled Treasures of a Storied Manhattan Collection open for bidding from June 15-July 1.

Doll specialist Theriault’s Summer Marquis auction will be conducted on July 10-11 in Annapolis, Maryland.

Included in the design sale to be held by Heritage in Dallas on July 15 is this walnut frame from c.1970 by George Nakashima (1905-90).

On July 15, Stair in Hudson, New York, will offer the collection of photographer Luigi Pellettieri.

Poster Auctions International holds a 500-lot auction that includes Art Nouveau, Art Deco, Modern, and Contemporary designs by a mix of designers.

Stanley Gibbons, the buyer of the world’s most expensive stamp at Sotheby’s New York last week, said it plans to “democratise” its ownership by inviting the public to buy shares in it.

After a decade riding a market wave, ‘original owner’ Rolex tool watches are increasingly scarce at auction.

An Americana sale held by Swann (25/20/12% buyer’s premium) was led at $55,000 (£39,855) by an 1830, Palmyra first of 'The Book of Mormon'.

An Illustration Art sale held in Dallas by Heritage (25/20/12% buyer’s premium) included a classic EH Shepard Winnie-the-Pooh work.

Sold for $42,500 (£30,795) was a very appealing Einstein lot that offered a short but amusing letter dating from November 1928 and a signed photo-portrait.

The Travellers Tour through the United States of 1822 was once described as the first American board game.