Hi Alex, my trusty "Safety Razor Compendium" edited by Robert Waits says that Neo Lux was a company started by Hermann Zaiss in Solingen-Ohligs, Germany. In addition to the fore mentioned razor the company produced at least 8 models with straight, tilted and adjustable angle heads. There were closed comb, smooth or ribbed bar guards, metal & various colors of plastic, fluted handles. German patents dating back to 1937 and on into the '50s. Three variations of the eight noted are shown in the Compendium, the Neo Lux ,the Neo Ras, and the Neo Gam-Neorador. I am told that the "Schragschnitt" on the box means diagonal head. Here are two that I picked up along the way. I have never shaved with one although I have read of others who shaved with this style and found it very effective.
Ah the Safety Razor Compendium saves the day again. This thing is like my bible