Hello,
The uniform is not an
Ulanka. It is an
Überrock (Engl. undress frock coat). The arrangement of the buttons on an Ulanka was different; there was a large gap between the top button and the one below it. An Ulanka was buttoned down on both sides, unlike the Überrock, which was a double-breasted jacket in effect. The Überrock had a very distinctive stand-up collar.
Here is a good picture of the uniform
https://spessart-militaria.de/produkt/preussen-ueberrock-und-schirmmuetze-fuer-einen-leutnant-im-11-artillerie-regiment/.
It was not limited to artillery and pioneer officerss. In fact, the young officer was probably a
Leutnant in the Infanterie-Regiment Nr. 20, not 2.
This type of frock coat was removed from the range of uniforms with the revised regulations of 1915.
The double-breasted
kleiner Rock became regulation dress at the time. That tunic, however, had a turn-down collar.
The picture is quite probably pre-war. Interestingly, it bears a stamp of the local tram company (Straßenbahn).
By way of clarification, Leutnant a.D. (außer Dienst) = retired Lieutenant.
