Welcome to the forum! My complements for asking a question before you buy -- many people buy first. I have loads of opinions on these helmets...
This is a very tricky area of helmet collecting as well is a very tricky area of understanding. Good solid references are not quite there that I'm aware of part of that is a translation problem but not all of it.
Prior to 1910 there was no such thing as a veterinary officer -- veterinarians were only Beamte or officials. As a result, veterinarians wore Beamte type helmets. Then suddenly in 1910 you had four commissioned officer ranks for veterinarians. These went by contingent and the real catch is not everyone was selected to move from Beamte to officer. So if you had new style "Officer helmets" as shown by tafel number 158 of Das Deutche Heer, you also had Beamte helmets. As far as I know there is no clear delineation of how these all worked at least that is the impression you get from page 446 of Stubbs. Little Eagles, Beamte helmets, Officer helmets... good questions.
There is also an issue of "medical officers". The veterinary officer was considered a medical officer and lumped as such as they were not combatant officers. However, the veterinary system was not part of the medical system. In Cron you regularly find the veterinary stuff underneath the train heading.
So my vote would be buy something less confusing for your first helmet. There is no substitute for having one that you own. And that will lead to a million questions and research. The problem with veterinarians is finding answers.
As an aside, in addition to agreeing with Bruno's comments, I do not like the threaded post on the inside -- seems a bit thin.