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200 Korun With Omron Rings
| Issuer | Česká Národní Banka (Czech National Bank) |
|---|---|
| Year | 2018 |
| Type | Standard circulation banknote |
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|---|---|
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| Protection type | Watermark, Security thread, Omron rings, Colour-shifting ink |
| Protection description | Portrait of Jan Ámos Komenský; Windowed thread inscribed "ČNB 200 Kč"; Omron rings (EURion constellation): yellow rings distributed across both faces; the numeral "200" at lower right of obverse. |
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| Comments |
The Omron rings — a constellation of small circular patterns readable by photocopiers and many inkjet printers — were added to this issue specifically to trigger copy-prevention software built into modern reproduction hardware. Their inclusion on a note already carrying colour-shifting ink and a security thread reflects a broader mid-2010s push by European central banks to harden circulating notes against increasingly capable consumer-grade scanning equipment.
Kulhánek designed the original 200 Kč series beginning in the 1990s; this 2018 iteration is a security upgrade rather than a redesign. Ondráček and Fajt are both established intaglio engravers at Státní Tiskárna Cenin, whose Prague facility has handled Czech currency production continuously since the post-Czechoslovak transition.