With regards to the Black case discussion.
All of mine are Black and the way I have got around identification issue is by having some very bright Orange luggage tags with a White Aircraft logo on them which is slightly luminous.
They have a small metal wire hawser and a screw coupling which locks together. The tag is made of 5mm latex and are a little smaller than an iPhone and cost around £35 which seems a lot, but they are over 10 years old and and are as tough as old boots and were made in US.
In all my travels I have yet to see any others. I am sure there are other companies doing stuff similar but yet to see another one like mine also I would say if you do this a lot you get to know your bag from its various battle scars.
Cheers
Mr Mac