VERY RARE Zulu War Era, Swinburns Patent, 577x450 Obsolete Calibre, Natal Government Contract Carbine Retailed By J & R Blakemore, London. Sn - 21482 VERY RARE Zulu War Era, Swinburns Patent, 577x450 Obsolete Calibre, Natal Government Contract Carbine Retailed By J & R Blakemore, London. Sn - 21482 Single Shot .45 Rifles