The Lachenal has raised metal ends with what I think may be erinoid buttons,it seems to kike me as I have sold it several times and ended up getting it back in part ex for a more expensive upgrade, no one here is interested it the price quoted then I will put in to a local auction and see if anyone goes for it.
Regards.
Mike
Everything that could be changed internally has been done in recent years , I am a crane duet player so McCanns are one of life's mysteries tome.