An extremely uncommon combination of awards here! This medal bar features, from L to R:
 
China Medal
The China Medal (China-Denkmünze), was a medal of the German Empire. It was established on 10 May 1901 by Kaiser Wilhelm II, in his capacity as King of Prussia and German Kaiser. There were two versions of the medal, one in bronze, and a variant in steel. The bronze medal was a reward for service by German troops and civilians during the Boxer Rebellion. The steel medal was awarded to people contributing to the war effort at home and the sailors of the merchant fleet transporting the soldiers to China.
 
Hindenburg Cross for Non-Combatant *this medal dates the bar to the mid 1930's.*
The Honour Cross of the World War 1914/1918 (German: Das Ehrenkreuz des Weltkrieges 1914/1918), commonly known as the "Hindenburg Cross" or the German WWI Service Cross was established by Field Marshal Paul von Hindenburg, President of the German Weimar Republic, by an order dated 13 July 1934, to commemorate service of the German people during the First World War. This was Germany's first official service medal for soldiers of Imperial Germany who had taken part in the war, and where they had since died it was also awarded to their surviving next-of-kin. Shortly after its issuance, the government of Nazi Germany declared the award as the only official service decoration of the First World War and further forbade the continued wearing of German Free Corps awards on any military or paramilitary uniform of a state or Nazi Party organization.
 
Prussian 15 Year Service Cross 
A Service Award Cross (Dienstauszeichnungskreuz) was an award for long-time service as a civil servant or member of the military. Prussia had a service cross for 25-years service for officers as well as service awards for nine-, 15 - and 25-years' service in the active Army.
 
Prussian Reserve-Landwehr Service Medal, 2 Class.
The Second Class Landwehr Service Decoration was awarded “after having fulfilled their duty in the reserve and Landwehr without reproach” to “those officers, doctors, non-commissioned officers and military men (...) who took part in a campaign or for exceptional reasons.
 
Medals and ribbons are in excellent condition, with no major damage or wear present. Hindenburg Cross is marked to the reverse for Paul Meybauer, Berlin. Original pin and catch are present on the reverse, however the original pin plate which attached the pin to the bar itself has been lost to time. The pin is held in place by the backing and it's catch loop.