This knife comes from a private collection. Similar to the production FB04, this knife is marked F. Perrin on both the front and pile sides of the tang above the deep choil, which provides excellent index finger placement. The rear of the blade spine and the tang sping are fileworked. While the production model FB04 has synthetic handle, this knife has wood, thought to be Cocobolo, scales. Thong hole and wrist lanyard. Blade has scratches which appear to be mainly from sheath withdrawals.