und DC kommt zuruck mit:
I'm afraid I don't know a lot about NASA's birds. Having read down the thread prior to answering this I think it's likely the lettering had to be replaced many times. It's normal for aircraft lettering to deviate from established practice or conform to an official revision.
On the subject of kits I think the Monogram is possibly the best SR-71 out there and I've built two of the old Revell's and the Italeri YF-12. I would never recommend the Revell kits except to collectors.
Bill Banaszak, MFE