Don’t worry - the blouse is definitely WWI! Those copyright dates dealt with the system for making patterns, not the date of that specific pattern. Tissue patterns were still really new at that point, so they were copyrighting stuff like they way they punched holes in the tissue for makings, the way they were cut out, etc.

So the technique used for manufacturing patterns made by that company started in 1907, but that specific blouse is definitely later. There is no way on earth that a blouse like that would exist in 1907. The styles changed a LOT in 10 years!