|Shipyard||Blohm & Voss, Hamburg (Werk 300)|
|Ordered||27 May 1916|
|Launched||26 Jan 1918|
|Commissioned||20 Jul 1918|
|Fate||22 Nov 1918 - Surrendered. Ran aground on the English East coast on the way to be broken up in 1921..|
There was another U 123 in World War Two
That boat was launched from its shipyard on 2 Mar 1940 and commissioned into the Kriegsmarine on 30 May 1940. Take a look at U 123 from WWII.