An emphatic expression meaning genuine or authentic without doubt; used to stress that something is truly what it appears to be.
あの時計は正真正銘のアンティークで、父から譲り受けたものだ。
That watch is a genuine antique; it was passed down from my father.
彼の成功は偶然ではなく、正真正銘の努力の結果だ。
His success was not accidental but the result of genuine effort.
これは正真正銘の本物だ。値段に見合う価値がある。
This is the real thing — it’s worth the price.