The 10.5 cm Flak 38 was a German anti-aircraft gun used during World War II by the Luftwaffe.

In this role it proved to be too heavy for field use while having roughly similar performance as the 88 mm, therefore it was used primarily in static mounts.

Related to the Flak 38, it was installed on the Bismarck and Scharnhorst classes of battleships as well as the Deutschland- and Admiral Hipper-class cruisers.

After the war, it was used for a few years by the French Marine Nationale on the reconstructed ex-Italian light cruisers, Châteaurenault[3] and Guichen.

[4] In the late 1940s, the French also planned to equip the battleship Richelieu with twelve of these mountings, but the project was cancelled due to credit shortage.