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| 背面描述 | The Muscat Securities Market building appears at left, flanked by an aerial vignette of the Rysayl Industrial Area at centre; the Oman Chamber of Commerce and Industry building occupies the upper right. Arabic legends run along the upper border, with English inscriptions below. |
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| 防伪类型 | Watermark |
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The P#37 20 Rial note was issued under the authority of the Central Bank of Oman during a period of relative monetary stability, when the rial's peg to the US dollar — fixed at approximately 2.6 USD since 1986 — made Omani paper currency among the most structurally sound in the Gulf. Thomas De La Rue's long relationship with the Central Bank of Oman dates back to the earliest post-Sultanate issues of the 1970s, making this a continuation of an unusually consistent printing arrangement.
The watermark security is notably minimal for a high-denomination note of this vintage, well behind contemporaneous issues from neighboring Gulf states that had by then adopted security threads and color-shifting inks.