The single shoulder board for an Oberleutnant zur See of the Kriegsmarine represents a characteristic rank insignia of the German Navy during the period of World War II. These shoulder boards, also known as Schulterklappe or Achselstück, were essential components of the service uniform and enabled immediate identification of the wearer's rank.

The Kriegsmarine was officially established on June 1, 1935, as the successor to the Reichsmarine and existed until the unconditional surrender in May 1945. The rank insignia and uniform regulations of the Kriegsmarine were based on the traditions of the Imperial Navy, but also featured significant innovations. The rank of Oberleutnant zur See (Senior Lieutenant at Sea) corresponded to the Oberleutnant in the Army and was the third officer rank in the career path of naval officers, following Leutnant zur See and preceding Kapitänleutnant.

The present shoulder board is manufactured in the sew-in version, indicating its use on the service jacket or tunic. This variant differed from the slip-on shoulder boards used with other uniform items. Rank designation in the Kriegsmarine was accomplished through a specific combination of golden rank braids and stars. An Oberleutnant zur See typically wore two medium golden braids as the basic identification of his rank.

The shoulder boards of the Kriegsmarine were manufactured on a dark blue background, corresponding to the Navy's branch color. The rank braids consisted of golden-yellow thread, which could be made from genuine metal wire or gold-plated material, depending on the execution. Quality and workmanship varied by manufacturer and period of production. During the war years, especially from 1942 onwards, increasing simplifications and material savings were implemented.

The uniform regulations of the Kriegsmarine were strictly controlled and defined in various dress regulations. The correct attachment and quality of rank insignia were carefully monitored. Shoulder boards were required when wearing the service jacket and other uniform items and had to comply with the respective clothing regulations.

An Oberleutnant zur See had already completed several years of service and possessed practical experience in various areas of naval duty. After naval cadet training and time as Fähnrich zur See (ensign) and Leutnant zur See (lieutenant), an officer typically reached this rank after approximately four to six years of service. Oberleutnante zur See served on various units of the Kriegsmarine, from U-boats to destroyers and cruisers to battleships and shore installations.

The production of shoulder boards was carried out by various uniform manufacturers and specialized producers of naval equipment. Well-known manufacturers included companies in Hamburg, Kiel, and other naval cities. Quality and workmanship could vary, with higher-quality versions using better materials often being produced for officers compared to enlisted ranks.

The present specimen in condition 2- indicates a well-preserved piece with minor signs of use. Such shoulder boards were worn during the officer's service period and therefore often show typical aging and usage characteristics. The preservation of such rank insignia is of great importance for military-historical research, as they represent authentic evidence of the uniforming practice and material culture of the Kriegsmarine.

In military-historical collections and research, rank insignia occupy an important place. They not only enable the reconstruction of uniform regulations but also provide insight into production techniques, material usage, and the organization of military hierarchy. For collectors and museums, well-documented and authentic pieces are of particular value, as they establish a direct connection to the history of the German Navy and the history of World War II.

The study of such objects contributes to our understanding of the organizational structure, career paths, and daily life of naval officers during this period. Each shoulder board represents not only a rank insignia but also a piece of personal history of the officer who wore it, serving as a tangible link to the experiences and events of that era.