Get him to put a (photographed) polished blank into the sheath and then re-photograph.
As someone else said, it was probably there all along.
Doh... Really should have read the whole thread!
I've managed to hold-off buying one, purely because my large handled Stanley does the job - 100 double blades, changed everytime I start a new project, seems plenty sharp right up to 5mm leather.
I used a 3/4" thick slab of marble and sat it on top of one of those lap trays (hard tray on top with a big bag of polystyrene beads underneath).
It probably sounds like it shouldn't work, but it does. Also means I can sit sown with the tray on my lap if I feel laaaazy :D