I'd give it a miss if it was me. I bought a similar item a long while ago just to see what it was like - the metal wasn't even good for honing practice. As soon as it got near bevel-formation, the edge rolled over. The strop looks the part, but the one I got needed some serious work on it. It had to be sanded back and, to be fair to it, it saw quite a bit of use as a bench strop glued to a lump of timber and coated with CrOx, but almost any leather would have sufficed with the surface removed, pumiced, saddle-soaped, oiled and pasted.
Good vintage gear is hard to beat - I think it out-performs most of the new stuff, but the catch-22 is that you have to know what will make a good blade or strop, so plenty of reading-up on the subject and some practical experience of actually seeing and restoring stuff is of prime importance.
You never know though - there is always the exception to the rule!
Regards,
neil