I have an old set of Held Denver's which I used for years on my various Thunderbird 1600/1700s before I came across a bargain price set of factory panniers. If I recall I rode to the South of France from UK last summer using these. They did the job very well and of course were both lockable and easily removable ( by me) at the end of the ride. They're now on my 865 Speedmaster and doing well. They are built to last and don't look their age.
I ended up getting new Givis. I’ll post picture soon. Thanks for your suggestions and comment. In the end, I decided based on mounting style and availability here in the states.