There isn't to much known about Hol'Pifs
This particular razor was listed as a Le Supreme, but is more of a Hol'Pif.
We believe that L'Essor took over a bankrupt Hol'Pif, which must have had some unsold stock and/or parts.
The box says Le Supreme, its has the blade posts on the topcap which is the same as a Le Supreme, and the twist knob has a groove in the middle.
Everything else about it indicates Hol'Pif and two main things are that identify it as a Hol'Pif are:
    (a) - it's not differential. It has the same gap each side and
    (b) is handle is removable.
Best guess is that it is some sort of "Transition" razor, where Le Supreme used some Hol'Pif parts to manufacture stock to sell.

When I received it, It had a sticky adjustment and I dismantled it and took the opportunity to give it a good clean. The bottom of the third picture shows its parts.

How does it shave? The jury is still out, I've only had one shave with it, and found it to be a fair bit more effecient than a Le Supreme. I will update once I have used it some more.