Noto Serif Ottoman Siyaq
Google Fonts · Google / Monotype · 2021

An exceptionally niche typeface supporting Ottoman Siyaq numeral script, serving historians and archivists working with Ottoman-era documents.
About
Noto Serif Ottoman Siyaq exists almost entirely to fill a Unicode block that would otherwise go unsupported in digital environments. It enables the faithful reproduction of Ottoman administrative notation for scholarly publications, archival databases, and digital humanities projects. With a single weight and no stylistic variation, it is purely a utility typeface for a very specific historical purpose.
Classification
Ottoman Siyaq Numbers is a highly specialised historical numeral system used in Ottoman administrative documents, and this single-weight face is effectively the only contemporary digital option for rendering them. It is a scholarly and archival tool rather than a general-purpose typeface.