Every single one of them probably "worked" as designed and marketed, or close enough. Safes don't claim to be fireproof and will clearly state something like "F

Every single one of them probably "worked" as designed and marketed, or close enough. Safes don't claim to be fireproof and will clearly state something like "Fire protection for 1/2 hour at 1400F." Very few get into "Likely to survive the total burn-down of a home" territory.