fit is roomy. Maybe not as large as Barrie, but very close.
As for shell, this model didn't have a shell option, but a few years back, when still with Franco's, RR sold the same shoe as a derby in shell. Got a pair NWOB here on SF when the BS section was still incredible.
please excuse the lack of proper shine. These were my first shell shoes and I was still awaiting the arrival of proper shell cream in the post when I took this.