Thanks for the clarification, andybeau and DeepEnd, that looks about right. the first Planar2 & 3 had the R200 arm, until 1983.
Blackout, I was assuming that Rega had different colourways, with some models having silver straps, others black. My RP3 has a black strap, and looking on the Rega site, both colours have silver straps - sorry.
However, my comment on looking past the strap colour remains; you'll be missing out on a great deck. I upgraded my 1980s Planar3/R200 to my current RP3/RB303, shortly before the new (current) version of the Planar 3 came out, and the improvement was night and day. If it really does annoy you, I'm sure that either black tape or paint will work?
Or you could look out for a used RP3, which should still be in good condition. Rega RB300-onwards arms are often used by aftermarket companies, to be modified, so they must be quite good?