SG 63a 1948 2½a. on 2½d. Olympic Games issue of Great Britain.  Surcharge Double. SUM.

Bahrain 1948 King George VI 2½a. on 2½d. ultramarine Olympic Games issue of Great Britain.  Surcharged with SG Type 5.  Left marginal example.  Variety, ‘Surcharge Double’.  Superb unmounted mint condition.  KGVI Expertising Certificate No.  0622/12-06 (2006).  AN EXCEEDINGLY RARE ERROR WHICH ONLY OCCURRED ON A SINGLE SHEET.