Instructions
Look for a Georg Jensen flatware silver stamp that has the letters "G" and "J." The letters may appear in various sizes and fonts, and may occasionally be intertwined. These initialed stamps all date the Georg Jensen flatware to his early years, between 1904 and 1919. If the initials are surrounded by a square box, the flatware dates between 1933 and 1944.
Run your finger over the Georg Jensen flatware stamp to see if the name George Jensen is raised. If the stamp has raised lettering, it dates to between 1915 and 1927.
Examine the flatware mark to see if it looks like it was stamped with a series of tiny holes, called pinpricks. This pinprick pattern for the stamp dates to the 1930s.
Check to see if the name is surrounded by a pinprick oval circle. The company started this stamping signature in 1945. Underneath this circle should be a Swedish dating code that indicates the year the Georg Jensen flatware was made.
Compare the flatware mark with images of Jensen's known marks in a book or online.