Yes, I am the proud owner of an Osborne 86a leather splitter. The single most expensive tool I own. It is of cast iron framework but it’s the high-quality blade that adds most to its value. I have mounted it on wood which I attach to the edge of my bench with sturdy G clamps.
I use this tool mainly to thin the buckle end of my leather belts. I could do this with the hand skiver or the head knife but I chose to treat myself to this, because I like toys. I pull the strap through and in one or two passes I have trimmed the required amount and am left with a perfectly smooth finish to the area of leather I intend to turn over.