GENESEO, NY — An ingenious timepiece requiring no springs but only gravity is a top lot at Cottone Auctions on Thursday, May 30, part of its two-day Art & Antiques and Antiques & Clocks sale May 30-31. The full catalogs are now available for review and bidding at LiveAuctioneers.

Made of gilt bronze and resting on an onyx base, the clock dates to 1900 and is virtually identical to the one exhibited at the Exposition Universelle of 1900. Outfitted with both a thermometer and a barometer, the clock uses a compound congreve design. As the clock runs and the large wheel slowly rotates, it allows a ball to escape once per minute down the three-tier track into the conveyor belt. When activated by the movement, the belt lifts and another ball is allowed to roll into the track above and then drop into the wheel.

The clock is in operating order and is estimated at $15,000-$25,000.

The sale includes nine Seth Thomas clocks, led by a Regulator No. 14 clock. Standing tall at 8ft 4in, the 1886-dated timepiece is made of carved burl and walnut with a nice patina, an original 14in silver-plated dial, and is signed Seth Thomas. It is estimated at $10,000-$15,000.

Edward Howard and Charles Rice formed E. Howard & Co. in 1858, after the Boston Watch Company went out of business. They specialized in high-end timepieces that are sought by collectors worldwide. The Cottone sale includes 11 examples of their work, including a Regulator No. 12 standing 5ft 2in in height. This model was first released in 1858 and performs eight-day time with its glass jar pendulum. From a private midwest collection, it is estimated at $6,000-$8,000.

Day one showcases 30 Tiffany Studios pieces, making an impressive presentation. Among the highlights are a fine Clematis hanging light fixture with a drop-height of 39in and a diameter of 29in. Made of leaded glass and patinated bronze, the fixture is impressed TIFFANY STUDIOS NEW YORK 1604-11. It carries an estimate of $50,000-$80,000.