Identification information for Gruen wristwatches is typically located inside the watch case. All the information stamped inside the snap-back style case is necessary for the most accurate identification.
The Gruen Watch Company began as a pocket watch manufacturer and was one of the first watchmakers to make wristwatches for both men and women; however, the records available regarding the numerous models of both pocket watches and wristwatches released between 1894 and 1958 are scarce. Gruen enthusiasts have pieced together information from contemporary advertisements and catalogs to identify specific timepieces. GruenWristwatches.com offers several tools to help with this task, including a style number dating tool, a catalog and galleries for comparison.