It's not just numbers. There simply is no catch to fail on most leather holsters, as there is on the Blackhawk. The releases have jammed. The springs have broken, causing the holster to retain the gun with no way to get it out. Don't think it's happened a lot, but it's an unacceptable occurence for a holster with it's intended purpose. A holster that retains with tension, whether leather or kydex, simply cannot fail in such a way.
BINGO!!! Any failure is too much when it comes to your life... could this mean.... equipment matters???? Shock and awe!!!