se-tenant with an unsevered surcharged stamp; fine with much original fresh gum. R.P.S. Certificate (1960). S.G. 13a/b, £11,400+" /> unused Block of Four 1891 (Jan.) Provisional "½d." on 1d. claret, a quite remarkable block of four - the upper pair surcharged and unsevered, the lower pair comprising an unsurcharged whole stamp <I>se-tenant</I> with an unsevered surcharged stamp; fine with much original fresh gum. R.P.S. Certificate (1960). S.G. 13a/b, £11,400+ | Christie's