My friend @ssgt, I did a quick net search and, to my surprise, I have to confess, found out that, apart from the Italeri/Testors that I knew, Monogram, Hasegawa and Trumpeter have 1/72 Blackbirds.
The Revell offering is a 60's mold, the Italeri, Monogram and Hasegawa are 80's and, presumably, better. The Trumpeter is a 90's mold, however, being one of early Trumpeter releases, I would not be surprised if it is a "legalised" copy of one of the others.