I was thinking about Chewy beachboy19 not Ben. There's only 5 Made in Taiwan 12 backs, Vader, Chewy, R2, Leia and Luke. The rest of the Taiwan figures where ROTJ produced.
I've not seen it myself but I did see someone ask the question on RS once about what COO the Taiwan R2 had and some one who owned one said his was a No COO version. I've also read that there was some Taiwan Vader that didn't have any leg detail at all. There's HK produced No COO R2's though so it would come down to matching the paint colours within a Taiwan one as the HK No COO's are latter produced