Actually this is an Transcaspian urial (Ovis vignei arkal), The Marco Polo sheep wouldn't be so reddish and have such a beard, nor does the enclosure and the amount of inhabitants fit
Hmmm... thanks for correction! I said that just because during my visit there was Marco Polo sheep but not urials in this collection. But it was six years ago, so I see that things changed now
Along with what @lintworm said, if I'm not mistaken, I believe a mature Marco Polo ram has more elaborate twists, completing about a circuit and a half and being very wide. Meanwhile the horns of the Urial generally makes about one circuit and the horns are a little tighter.
@savethelephant Problem is that TP Berlin also keeps several non-mature rams, there is one MP ram who currently has very similar horns to this Urial. These horns continue to grow throughout life....