Expiry Dates

Although my, and our bosun's expiry date as well, has been expired already for decades, i am talking about other dates: helmet expiry dates. Our 'Old Faithful Bosun' Nyuap ak Ajak used to have the same American style helmet as i do. But his helmet's date has been expired since this trip. My helmet has still one year to go, and i know he loved his helmet, so I gave him mine.