GIBRALTAR. Government of Gibraltar. 20 Pounds, 1.7.1986. P-23c. PMG Superb Gem Uncirculated 67 EPQ.
The key denomination of this series, this type was never available in quantity, unlike the other denominations (including the 50 Pound note). This example has the final date of issue and is seen here in fantastic Superb Gem Uncirculated condition. Just three examples presently grade finer in the PMG population report.

Estimate: $500.00 - $1000.00