Yes, that kit is indeed a dressed up version of the late 1970s vintage pre merger Revell kit. That was one of several single seat WWII fighters that Revell released at that time. The others being a P-51D, Spitfire Mk.II, and the Me-109G10. The Mustang has been re issued as part of a combo twin set of "Reno Air Racers" by Revell Germany with the Monogram T-6, but not solo post merger. The Monogram 1/48 P-51D released around the same time was a much nicer kit and keeps getting re issued instead. But the Spit and 109 are still going strong in R/M boxings even today as they near age 40...