In the photo, the left CJ has the Superfast wheels, yet the box still shows the old ones. The introduction of the gun resulted in an opening in the rear floor for the plastic gun mount, which was closed once the gun was no longer offered. It was available internationally starting in 1994. Introduced in the 80s, it comes with Superfast wheels. The Fire Chief versions can be seen on the Jeep Station Wagon Fire Service Toys page.
Further contributions welcome.
Elsewhere on the web, Toshimi Ohashi's Diecast Models Collection has a large photo-reference of Matchbox Jeeps. Return to Collecting Toy Jeeps on The CJ3B Page.