Obverse

Portrait to the left of Jean, the Grand Duke of Luxembourg from 1964 to 2000 surrounded by its name and the signature of the engraver.
Jean Grand Duke of Luxembourg
J.N. Lefevre

Reverse

Facial value surmounted by a royal crown, surrounded by two branches of oak, the date at the bottom flanked by the currency and the private brand (see comment below), and the initials of the engravers below.

Lettering:
20F
DATE
Njl

Non-contractual photo