It's not mine, I have been asked how to do it by someone else.
Nothing like any of mine which have a button in the center of the top of the handle which allows you to remove the cone shaped cover to put a spanner on the body of the tap itself.
Apparently the plumber that changed the washer last time had some difficulty with it but the tap owner can't remember how the plumber did it and doesn't want to pay another $150 again to film the plumber doing it again.