Type: Inscription
Location: Reverse, on frame
Inscription: "Blue 21" (black marker)
Type: Inscription
Location: Reverse, on frame
Inscription: "57.993.2" (red paint)
Type: Inscription
Location: Reverse, on webbing
Inscription: "#21" (green marker)
Type: Label
Location: Reverse, pinned on tag
Inscription: "1969.5652/slip seat" (graphite)