Notausruestungs- und Ueberlebensweste mit Armfesselungseinrichtung
Type SECUMAR SW2A

Used by German Jets pilots like PA 200 Tornado or Phantom at over Land flights.
In the single collar there is the antenna of the MR506.
The sleeves are connected with body return system of the Ejection Seat, to avoid
injuries in case of an emergency seat exit.