I think it might help some if I post the relevant section from Twinning.

Often if one person makes a mistake, that is faithfully repeated and entrenched.

What Twinning had to say. Please note that Twinning is difficult to read and interpret.



Here are some photos. The 1st two are from Franck




This photo is not from Coronation Day, but later.



The Festoon necklace