(เครื่องราชอิสริยาภรณ์อันมีเกียรติยศยิ่งมงกุฎไทย; RTGS: Khrueang Ratcha Itsariyaphon An Mi Kiatti Yot Ying Mongkut Thai). Instituted in 1869 by King Rama V of The Kingdom of Siam. Type I. (1869-1948). A sash badge in silver gilt consisting of green and red enamel flower petals, obverse centre presenting detailed embossed Royal iconography, reverse with Thai characters, surmounted by a tri-petal suspension in silver gilt, marked in Thai on the reverse, measuring 48.9 mm (w) x 74.2 mm (h - inclusive of suspension), weighs 47.1 grams, accompanied by a full-length sash, with gilt loss and light enamel wear, near extremely fine condition. Accompanied by the fine Star of the Order, also consisting of an outer ring of alternating green and red petals, obverse centre exhibiting enamelled Royal iconography, on a pleasant blue enamelled field, reverse with flat pin assembly, marked in Thai on the reverse, measuring 67.8mm (w) x 67.8mm (h), weighs 90.1 grams, presenting minor cracked enamels, extremely fine.
Contained in original case of issue, a blue velvet exterior with gilt Thai insignia, the interior with a silk white lid bearing the maker mark in Thai and ARBHON SAHAKARA WORACHACK ROAD BANGKOK, the base presents a crème coloured velvet recessed medalbed with ribbon storage component below, measures 185mm (w) x 160mm (l) x 70mm (d), light wear to exterior velvet, hinge and catch functional, remains in extremely fine condition.