[phoenix_iii]

Two things to consider

1) Remove firing pin - if it gets stolen, it will be less useful, at first
2) Can you see it from outside the house? Will it be up when repair people (plumber, carpenter, carpet cleaner, electrician, appliance repair person) come in? Be mindful if you are hanging that up, you are advertising you probably have more, elsewhere, and may be a good burglary target.

You could make a wooden backer plate (stained, or painted), with a little label, and then have it rest on a shelf, with the backer plate, like an L, and could come up with a bunch of ways to attach the plate to the wall. All out of wood, of course.