Some more info.

The Vulcan carbine came out as a MkII or Series 2, in late 1983.

The Victor (1981-88) was a youth model. Plain stock, shorter butt. Slightly weaker spring for easier cocking. No safety.

Victor replaced by the Excel in 1988. Similar, but full power and a higher price.

Beeman C1 carbine: 1983-1991. A Vulcan action with a 14" barrel in a straight-grip stock. Originally had no safety catch. Not popular here, but briefly quite popular in the US.

The Stingray was sold as a standard rifle and as a carbine. As you say above, a deluxe model with a walnut stock was offered.

From the Vulcan Series 3, the trigger blade on this family (and it is the same trigger on the Tracker and Viscount sidelevers) was made much more curved.