Help needed with the ID of this unusual small knife

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Still dragging oddities out of my 'heap' and came across this odd lirrle crude knife . Any suggestions as to what it might be. I would have dismissed it as crude utility piece but for the odd 'pommel' with the hole through c/w with tiny projecting metal spike . Overall length 7.5 inches , blade length 3.5 inches. The scabbard is a cut down but typical British sheath knife scabbard , but this may more of a recent marriage.