I have a Case XX 1836 Bowie knife with a brass strip is attached along the spine. Over the years, I have seen quite a few like it but this particular knife has the word "ALAMO" engraved on the blade. There is a card in the display box which reads:
Limited Edition Collector's Issue
# One of One
by (Case) @ Smith's
Specially Tempered Van-Kro Steel
Hand made in the U.S.A.
Is it possible that it came from the factory like this? Or is it more likely that the engraving was done later?
Case had an 1836 bowie for quite awhile that was similar to the one you described.
The initial one had an etching/engraving of a caracature of Davey Crockett!
Its not impossible that Case resurrected the design and modified the etching at a later date as a collectable offering.
Here's a link to what I believe is a closed auction of this knife : http://www.liveauctioneers.com/item/6118157