This dogtag belonged to Bernhard Zimmermann.
Obviously you have found the following:
1944-02-12, 2./KG 26, He 111 H-11LT, 8402, 1H+AK, Mittelmeer
Flugzeugführer Ofw Zimmermann, Bernhard, vermißt
Kampfbeobachter Hptm Leicht, August, vermißt
Bordfunker Fw Behrend, Alfred, vermißt
Bordmechaniker Ofw Weyhrauch, Karl, vermißt
Unbekannt. Bruch 100 %.
You should now immediately contact WASt in Berlin, because that is the institution, which legally can identify missing persons, declare them dead and contact possibly living relatives.
https://www.dd-wast.de/de/startseite.html
Matti