Mrs Coombes
Most likely an UK - hybrid of unknown origin.
Mrs Coombes was an English lady who owned a nursery at Mold in Flintshire, North Wales, in the 1950s / 1960s.
In UK nurseries the plant is also listed as "Pachyphytum 'Mrs Coombes'.
There are two forms in cultivation, a narrow leafed form and one with wider leaves. The flowers are the same.