Hand sewn Russian jack made of wool bunting with a rope enclosed in a linen hoist. The flag has a white cross on a red field on which is superimposed a white saltire surmounted by a blue saltire. A handwritten cloth label sewn to the reverse of the lower fly edge reads: 'Probably the jack of the 'Twelve Apostles' sunk by the Russians to block the harbour at Sebastopol. Taken by Admiral Sir Harry Keppel'. The flag has been darned to repair various holes.

The flag was originally flown by forts but was used additionally as a jack after 1720.

Sir Henry Keppel (1809-1904) in HMS 'Rodney' commanded a naval brigade at the siege of Sebastopol (see AAA0572).