By contrast , jaeger-lecoultre goes on selling its stainless steel reverso duo ( model ref. 271.84.10 ; 4500 ) year after year , ever since its first introduction in 1931 .

相反，积家（jaeger-lecoultre）自1931年首次推出reversoduo以来，就年复一年地出售这款不锈钢腕表（款号为271.84.10；4500英镑）。