Arab Republic of Yemen, Yemen Currency Board, obverse die proofs for 25 Rials (2), ND (1971), no signatures or serial numbers, one stage with borders only in black, detailing on second stage in orange-brown, ink annotations on face, about uncirculated and very rare, not issued in these colours, or even produced as a colour trial (2 notes)
TBB B109p, Pick 9p £120-£160