John, the Colt Double Eagle was offered in mutiple variations from 1989-1996.
The Double Eagle First Edition was made in 1989 with a total of 1000 being produced. This version of the Double Eagle didn't have a decocking lever. It was only offered in 10mm Auto and in excellent condition it could be worth about $600-$700.
The Double Eagle Series 90 I & II were made from 1990-1996. This version was chambered in 9x19mm, ,38 Super, .45 ACP and 10mm Auto. This version had a 5" barrel and in excellent condition it could be worth about $500-$600. Slight premiums would be added for those chambered in 9x19mm or .38 Super.
The Double Eagle Combat Commander was made from 1991-1996 with a 4.25" barrel. It was chambered in .40 S&W or .45 ACP and in excellent condition it could be worth about $500-$600.
The Double Eagle Officer's Model was made from 1991-1993 with a 3.5" barrel. It was only chambered in .45 ACP and in excellent condition it could bec worth about $500-$600.
The Double Eagle Officer's Lightweight Model was made from 1991-1993 using an alloy frame & a blued finish with a 3.5" barrel. It too was only chambered in .45 ACP and in excellent condition it could be worth about $525-$650.
Hope this helps!
Steve Mace
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After today, its all historical