español al inglés Arte/Literatura Música 13-key clarinet characteristics

Hello fellow linguists,
I wonder if anyone with knowledge of musical history and instrument making might be able to help me make sense of the above phrase? It is for a historical account of a famous instrument maker and the phrase in question comes from a sentence in which a jury of the Paris Exhibition Universelle awards a particular make of clarinet a silver medal and praises 'la calidad de factura del clarinete Sistema Romero.'
I can't imagine that the literal meaning of 'factura' ('invoice of the Romero System clarinet') is what is intended here.
I thought it might be something more like 'inventory' or 'composition'/'makeup'?
The full sentence from which it is taken is below:
En su catálogo del año 1892 se mencionan las palabras del jurado de la exposición, en ellas se elogia la calidad de factura del clarinete Sistema Romero: “Este clarinete estaba admirablemente acabado en todos sus detalles”.

Many thanks in advance for your help!