Officer shirmmutze

[partisan]

I know, the photos aren't very clear, but unfortunately I only have these. Can you get an idea about this officer's cap? Does it have any chances? Someone told me that it is wurttemberg Train Batallion 13 in Ulm, what he means? And above all, can it be from the period 14-18 or is it earlier?
Since I was offered an exchange, can anyone tell me (even approximately if possible) a price ?
Thank you in advanced
partisan