In your first and second picture, you can see that the brown rim is thinner on one side, that irregularity made me think of a possible repair but I don't know enough about Schneider to say if this is unusual or not, I'm only repeating what I can find in several books.
Re it being an early production, the only thing I could find was that when the Schneider house/brand was initiated, Charles Schneider was already a remarkable artist after having worked for Daum for several years, so I don't know if this, the glass being thinner at places and the rim not 'perfect', is unusual for Schneider pieces.
I had another look at the catalogue pages, and the majority of handled vases in the Jades section have round applied handles, the handles on your vase are more square, however, there's one model that does correspond more or less, the handles are nor as large but they are more square then the others but it's just in black and white print, it doesn't give any idea or info if the designs have coloured applications, but that's throughout the whole catalogue, so I guess we can't judge on that. But while I'm overlooking all the pages, I'm getting the idea that certain shapes were not found in other series as there are slight differences between the shapes and this one only shows up in the 'Jades' series. It's a bit difficult to see, as it's so small, but if you take the bottom right, just above the three bowls there's a ball shaped vase (nr 1091) with handles, and the model that I was talking about is nr 1090, just on the left of that. (no copyright mentioned)
I found in another book that this signature dates from the period 1918-1924 so that corresponds with the earlier dates I mentioned, perhaps that later pieces from these series were signed differently.