Dear Khun Nat,
This is not the Maerklin Set 26455, this is the Fleischmann 4305 Electric Hill climbing locomotive also known as "Edelweiss" which is a famous flower which also means "luxury white".
It is a private line and does not belong to any official line like the DB/DR.
The Model is based on the Model LAG 2 also know as the "Pauline" which later became the E69 02 as well as the LAG 3 "Hermine" which became the E69 03. Here it is painted with a fictional coloring of blue and white.
All this information with pictures is available here:
Hope I was able to help na krub.
Your Zug Haus Team