Kaiser Wilhelm II Postcard Signature question

[U Boot Kapitan]

Hello all,

Here is a recent find of mine. It is a picture postcard of Kaiser Wilhelm II. It is unused and is pre WWI (printed text of front/back is in English).

The signature is in original handwritten ink and not a facsimile. I have been comparing it to several examples of the Kaiser's and cannot satisfy myself that it is his, but who's can it be? Does anyone have any ideas of who might sign a photo of the Kaiser, or indeed, did the Kaiser have different styles of signature. There is nothing else written on the card anywhere else.

Please help,

Jason