10 000 Riels - Norodom Sihamoni Pyramids of Egypt

Cambodia's issuance of an Egyptian pyramid coin in 2005 sits squarely within the "world wonder" commemorative genre that flourished among smaller central banks in the early 2000s, typically produced for the collector export market rather than domestic circulation. These bimetallic pieces were almost never intended to pass through Cambodian hands at face value — 10,000 riels represented roughly $2.50 USD at the time, while production costs far exceeded that figure.

Norodom Sihamoni had ascended to the Cambodian throne just months earlier, in October 2004, making this among the earliest coins struck under his reign authority.