I can never remember which either and I'd lost my bookmark to the patent doc, so I went and did a little digging and the answer, strangely enough, is both. US1488907 was originaly filed by Julius Bueno de Mesquita on December 18, 1922 and was issued on April 1, 1924. Then on August 30, 1924 he filed US1540731, which was issued on June 2, 1925, with almost the exact same design. The differences between the two are ones we've seen in the examples of 1924-style razors that we've looked at before -- mostly in the fitting on the bottom of the head that takes the handle and the way it connects to the razor.
What's more interesting, I think, is that de Mesquita seems to have been working on this design for a long time before hooking up with ASR. On December 3, 1909 he filed US1135775, which appears to have been originally filed in England on June 21 of that same year, with a strikingly similar design. I don't know if his original design was ever manufactured and sold by anyone. It'd be cool to turn one up...
