Kovels’ August sale reports features Classic Bicycles, Vintage Cookie Jars, George Nelson Furniture, Modernist Posters, Advertising Tip Trays and Anri Figural Bottle Stoppers, with pictures and prices. Other regular monthly features are here, too — New Uses for Old Stuff, On the Road at Hawken School, Collector’s Gallery, and of course, Prices!

A 19th-century Cygnet “Swan” ladies bicycle sold for $24,150 at a bicycle auction in upstate New York. Kovels’ August 2013 newsletter gets up to speed on antique and vintage bicycles with pictures, descriptions and prices. Smart cookies know vintage cookie jars are sweet collectibles and they paid a wide range of prices at a recent Las Vegas auction of more than 140 classic jars. See the “Cookies Out of This World” spaceship cookie jar that went for $6,000 and other examples that sold for less in Kovels’ August issue. No designer says “nifty fifties” like George Nelson, and his sleek designs are hot among fans of all things mid-century modern. Kovels’ newsletter reports on two recent “modern” auctions, where several George Nelson pieces of furniture sold for prices ranging from $1,250 for a pair of lounge chairs to $10,000 for an iconic Marshmallow sofa.

Other August newsletter highlights include modernist posters—many topnotch works of graphic design—from the early to mid 20th century that were auctioned in New York City where the top price of $66,000 was paid for a sensuous avant-garde poster advertising Turmac cigarettes. Also featured are pictures, descriptions and prices of pre-Prohibition tip trays that sold at a summer advertising auction in Pennsylvania and wooden Anri bottle stoppers in the shapes of a newspaper-reading man, a rolling pin-wielding woman, a kissing couple and other figures.

Kovels’ column, New Uses for Old Stuff, shows a molded fiberglass chair designed by Charles and Ray Eames that was repurposed with a collage of mushrooms and called “Shroom Chair.” The popular illustrated Collector’s Gallery has answers to readers’ questions about a cloth pillowcase top, reproduction Coca-Cola sign, Bossons Indian wall figure and Canadian art glass bowl. August’s Dictionary of Marks lists U.S. makers of cookie jars. The Buyer’s Price Guide has current prices of dozens of antiques and collectibles.

Next month, Kovels on Antiques and Collectibles starts celebrating its fortieth anniversary. As a special feature there will be monthly looks at market ups and downs, value twists and turns, and trends that have come and gone. Each month an old article will be analyzed and compared with today. Examining trends and prices will lead to smarter collecting and better ways to find bargains and treasures. Keep an eye out for the September 2013 issue.

Kovels on Antiques and Collectibles is available as a print subscription or as a digital downloadable version that is part of the Kovels.com Premium subscription.