1986-92年不丹王国政府10努尔特鲁姆。样票。银行名称水印。设计细緻,墨色鲜明。红色样票加盖及有编号。BHUTAN. Royal Monetary Authority of Bhutan. 10 Ngultrum, ND (1986-92). P-15s. Specimen. PMG Superb Gem Uncirculated 67 EPQ.Watermark of bank title. Found with a detailed design with vivid ink. Red specimen overprint with black specimen serial numbers.