 
<translate> Hukuncin da ya dace a cikin nassi shine: A cikin 1873 J.S. Fry & Sons na Ingila sun gabatar da farkon kwai na Ista na cakulan a Burtaniya. Saboda haka, amsar ita ce 1873. <eng> The relevant sentence in the passage is: In 1873 J.S. Fry & Sons of England introduced the first chocolate Easter egg in Britain.
Therefore, the answer is 1873. 