From the amazon link you gave everything about this razor screams "don't buy me to shave with", I say this mainly based on the text as almost anyone with the right tools can stamp out a razor shaped piece of steel and put it in a pair of scales. Much as their description describes it as an heirloom piece of shaving equipment I suspect it is little more than an ornament.
Sorry to be blunt (probably like the razor ) but if you want a good shaving experience purchase something known to work. This doesn't have to be new or expensive, in fact there are usually shave ready vintage razors in our classifieds for similar money.