1000 Rupees Central Bank of Ceylon

Ceylon had already become Sri Lanka constitutionally in 1972, but the Central Bank continued issuing notes under the "Ceylon" name until a full transition to "Central Bank of Sri Lanka" branding was completed — this series, running into the mid-1980s, sits at the tail end of that transitional period. The 1000-rupee denomination was introduced relatively late in the island's note-issuing history and represented serious purchasing power at the time of issue.

P#90 is the final high-denomination issue under the Ceylon designation before the rebranding took hold. Survivors in uncirculated condition are less common than catalogue frequency might suggest — high-value notes in Sri Lanka were worked hard during the economic turbulence of the early 1980s.