unused Block of Four -- 2½d. Prussian blue, a fresh mint block of four with one unmounted. R.P.S. Certificate (1973). S.G. 76c., £1,200+. Photo | Christie's

Lot 516

516

unused Block of Four -- 2½d. Prussian blue, a fresh mint block of four with one unmounted. R.P.S. Certificate (1973). S.G. 76c., £1,200+. Photo

Details

unused Block of Four -- 2½d. Prussian blue, a fresh mint block of four with one unmounted. R.P.S. Certificate (1973). S.G. 76c., £1,200+. Photo