I would think the saddle is original to the bike.
Middlemores (Coventry) Ltd
Traded as Richard Middlemore & Sons, William Middlemore, Middlemore And Lamplugh, Middlemores (Coventry) Ltd
Industry Leather goods, mainly saddlery
Fate Dissolved
Founded Early 1800s
Founder Richard Middlemore
Defunct 1991
Headquarters
Birmingham, Birmingham and Coventry, Coventry
,
England
Key people
Richard Middlemore, William Middlemore, James Middlemore, Thomas Middlemore
Products Bicycle saddles,
horse saddles,
harnesses, military ammunition pouches and belts,
cigar cases
Middlemores Saddles was a horse saddles and accessories company based in
Birmingham,
England, with origins dating to the early nineteenth century. After several name changes they ended their time as a bicycle saddle and accessories company in
Coventry in the late twentieth century.
[1] The company had a trading period that can be documented to at least 160 years; making it one of the most
longevous companies to operate in England.
[2][3]