Rossini: Overture to Eduardo e Cristina (1819) with score

You can hear the music going in and coming out of the recycling bin if you listen to the Overture to Matilde di Shabran - about 70% of it is the same (incidentally a great, great opera of the highest order).
Performers: Neville Marriner (conductor), Academy of St Martin in the Fields
Programme notes by Keith Anderson for Naxos:
Eduardo e Cristina was written in 1819 and first performed in Venice at the Teatro Benedetto. The opera is principally a pastiche, using material from other works, supplemented by a few new numbers. It deals with the romance of Cristina and a Swedish soldier, Eduardo, their secret marriage, and Eduardo’s final triumph, after suffering imprisonment by the Swedish king. The overture is occasionally heard in the concert-hall. It starts with a slower introduction, leading to an Allegro brillante, its two principal themes highly characteristic of the composer.