The 400 labels are en route to you, Bill.
Ghost, Avery is simply a brand of self-adhesive paper label. You make a good point about them possibly coming off from contact with the scabbards. I hadn't thought of that so I did a little test.
I've got a WWII & a Sirupati, both of which have well-fitted scabbards. I put a label on the side of each blade, immediately in front of the handle, using just normal finger pressure (i.e., I didn't use a lot of force to press them in place). I then withdrew & replaced each blade 50X to check the effect. Although each label had rub marks from contact, neither was showing any sign of coming off. More good news -- both peeled off easily when I wanted them to w/o leaving any sticky residue.
I should point out that neither blade was oiled -- I use Tuf-Cloth -- so individual results may vary. Bill, you may want to test a few of these on blades you have on hand to judge how they work.
As Will suggested, an alternative could be to affix the labels to handles, not blades. I tried this too & I think it could also work. The label did adhere more securely to the smooth horn than the wood. For added insurance, you could send a few rolls of Scotch tape to each shop to be used for covering the labels on the handles. Regardless of how they are ultimately used, folks, I think we have a winner!
------------------
Cheers,
--+Brian+--