Interesting keys, although I think there was more than likely some modification and alterations going on there to be honest.
The 7 lever key in the centre is the ‘odd one out’ and suggests to me the original stem/bow was cut and the brass bow added to replace the original to ‘fancy it up’.
Likewise with the fluted brass bushings on the other two keys, which are of a much older type. They look nice and add a nice contrast but are out of place on that type of key. They are interesting and nice looking keys though, regardless of their past and it’ll be interesting to hear what other members think.