The uniform worn by waiters and waitresses at the Ahnenerbe coffee shop in the metaverse created by Kinoko Nasu of Type-Moon fame (including series like Fate (Series), Kara No Kyoukai. Mahou Tsukai No Yoru, Mahou Tsukai No Hako, Tsukihime, Carnival Phantasm and others). Ahnenerbe is actually a Magician's Box created by Kischur Zelretch Schweinorg that connect parallel worlds together so characters from different series can interact with each other.
Post #3923017 shows the uniform for both men and women. The female uniform has different colored aprons depending on the character.
The term Ahnenerbe means "ancestral heritage" in German.