Old South Arabian Number One (U+10A7D) is a Unicode other number from the Old South Arabian block. It resides on Plane 1 (SMP, Supplementary Multilingual Plane), has bidirectional class R (right-to-left), is not mirrored, and has combining class 0 (Not Reordered). In HTML it can be written as 𐩽 or 𐩽. Because it is outside the Basic Multilingual Plane, proper font support is required; otherwise a fallback box may be shown.