Did the Sony PRS-300 support justified text?

I try to test my epub files on a different devices. I have a Sony PRS-300 to see how the files look on older ereaders.

I've tried a few different settings, but I can't get paragraphs to justify. Paragraphs are always rendered as ragged-right. When I test my epub files in Calibre, or on a Kindle Paperwhite 10, the paragraphs are justified.

I am justifying my paragraphs with inline styles:

Inline styles seem to be a little more backwards-compatible with older devices.

All the ebooks that came with my PRS-300 also have ragged-right paragraphs.

I just wanted to check if I was missing anything. I've seen screenshots online of the older PRS-500 displaying justified paragraphs.

Thanks!