Looks like swamp ash. 10 lbs without strings.
I have quite a few swamp ash basses. Includes in that are a 4 at 6.6 pounds (with strings), a 5 at 7.25 pounds (again with 5 strings). My heaviest bass is 8.1 pounds - a 5 with dual soapbars - again with strings.
10 pounds for a 4 without strings is NOT light. I wouldn't call that Swamp Ash.
