List
old 5,000 won
La(4th) 5,000 Won Note

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 ① Windowed Security ThreadA plastic film with hologram letters is exposed at regularly spaced intervals. When the banknote is held up to the light, the segments of the thread are connected as a bold continuous line. 
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 ② WatermarkHolding the note up to the light, a hidden portrait of Yulgok appears in the non-image space on the left side of the obverse(and the right side of the reverse). 
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 ③ Watermark BarHeld up to the light, three horizontal dark bars and two bright bars appear in turn, thanks to the variation in thickness with in each note. 
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 ④ See-through RegisterHeld up to the light, the right-corner image on the observe matches the image on the reverse. 
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 ⑤ Intaglio PrintingA special method putting ink into the concave and printing as convex. The slightly raised figures can be felt.