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Learn the factors experts use to grade pocket watch movements, jewel count, adjustments, finish, accuracy, and what each grade means for collectors and value.

Josef Albers’ crisp geometric paintings and prints regularly command strong prices. Learn what affects their value and what collectors should know.

Henri Cartier-Bresson’s photographs can sell for a few thousand dollars to six-figure sums. Learn what drives their value, how to spot original prints, and whether now is a good time to buy or sell.

Henri Cartier-Bresson photographs can bring five or even six figures. Discover what drives their prices and where your print might sit on the market spectrum.

Lost the box and certificate? Learn expert-approved methods to confirm luxury jewelry is genuine without relying on original paperwork.

From Homage to the Square paintings to screen-prints, Josef Albers pieces command very different prices. Learn current market values and what drives them.