I did a double-take on this as well. Olga and Marie appear to be in the exact same pose as the photo we're used to seeing, but I knew right away something didn't fit with Tatiana. Wasn't sure if it was simply an uncropped version of the classic photo or something different, but I realize now the latter!
Great find. Amazing and unique outfits on the GDs! A nice change from the typical white/light dresses and navy blue (I'm guessing) sailor suits we're used to seeing them in. Too bad it was for KR's funeral. One of the most likable Romanovs in my opinion.