Anoctris said:
...I would suggest that the concept and application is not as far-fetched as it seems...
OK, let's think about that. How far-fetched does it seem? I don't think s.ob.'s are as far-fetched as, say, unicorns. Back-scabbards are definitely within the realm of "physically possible". It is possible to wear a sword on your back, & it is possible to draw it from such a scabbard, & I suppose that if you really practiced alot, & were very, very careful, you could even put the sword back into the back-scabbard. So it's not impossible. We know it's possible because we see it in movies ALL THE TIME (& we know it's not cgi), and lots of SCA-types have some kind of back-scabbard.
Then why don't we see it in illustrations? Why can't I google "back scabbard" and see a picture of one in something other than a bad movie, the He-Man cartoon, or a D&D manual? How come the BEST we can do is two vague (and arguably not very credible) references on Wikipedia? If back-scabbards were anywhere close to anything resembling practical, and was "a personal choice for the few among the majority", then we should see a few (10%, 5%, or even 1%) examples in things like the Bayeux Tapestry. We should see back-scabbards appearing regularly....not often, but sometimes. But we don't see them 1% of the time. We don't see them 1/100 of 1% of the time.
When we take note of that, how far-fetched DO they seem?
The implication is clear: while it's possible to wear a sword on your back, wearing one on the hip is objectively better. In every way it is objectively better. The sword is easier & faster to draw, easier and faster to replace, & it's easier & faster to put the belt on & take it off. It's also probably easier & faster to make a sword-belt than a back-baldric. Maybe it's not even better by a lot, but it's better by enough so that virtually no one ever chose to carry a sword sheathed on their back.
The only advantage to a back-scabbard is: it looks totally ninja.
I mean, how hard would it be for soldiers, government agents, police, & rednecks to make a "back-holster" for their pistols? (& I mean an over-the-shoulder back-holster just like a back-scabbard for a sword, not an underarm holster or small-of-the-back holster or anything like that) It's definitely possible. Maybe someone's even made one. You know how gun-people are. They love making custom accessories for their pieces....& there's lots of examples of innovative custom holsters out there, so I bet if we looked hard enough we could find an over-the-shoulder back-holster for a pistol.
Regardless....if an alien or time-traveler or whatever (who was making an RPG about Information Age Earthling humans) showed me his costume design, & it had a pistol back-holster, I'd be perfectly comfortable saying, "That's all wrong. No one ever did that. Pistols were never worn on the back like that. That's pure fantasy - you might think it looks cool, but it's sort of stupid. Just put the gun on the hip"
So in answer to the question, "how far-fetched do back-scabbards seem"? They seem about as far-fetched as a back-holster for a pistol - far-fetched enough that we see no GOOD evidence for them.
EDIT: I should have thought of this sooner. The back scabbard seems more far-fetched than the Hollywood cowboy fast-draw holster, which is known to be Pure Hollywood. That's where it ranks on the Scale of Far-Fetchedness.
Now that I'm thinking about it, Fast-Draw Holster vs. Regular Holster & Back-Scabbard vs. Belt-Scabbard are almost the same conversation.....