The 1984-92 series adopted common designs for all notes except the 1000 francs which at member country option could still carry the head of state image. Cameroun, Central African Republic, and Gabon used this option; Chad, Congo, and Equatorial Guinea did not. The only other variations were the country names and signatures, plus an English denomination for Cameroun notes and a Spanish denomination for Equatorial Guinea. The colors used for the various denominations of 1974-84 notes were continued for this series. Block numbers were expanded to three digits (e.g. A.001), although some initial printings exist with one-digit numbers (see below).