Now this is my take only, but I'm not a fan of Dovo razors. My first was a Best Quality 5/8, and for what is was supposed to do, it was a great blade to learn on.
After having some TI's, and a few other vintage razors at the beginning of my journey, I finally snagged a Dovo Bismarck, with the black scales and inlay, and all the nice gold wash. To this day, I find it one of the worst performing razors I own - it's been pro-honed, I have many razors to compare it to, and for me it's just a sub-par razor. Maybe it's just that particular blade, maybe it's just me, but I'm not a fan....my two cents.