What means
The 4 and 6 mark the filled positions: middle-right and lower-right.
A sextant here is a 2×3 grid inside a character cell. In a Teletext mosaic, the six numbered positions work as small blocks that can combine into simple pictures.
Why are the blocks separated?
The gaps are a deliberate Teletext display style.
Britain’s first Teletext specification appeared in October 1974. Its 1976 version defines six-cell graphics for adding simple pictures to the same fixed grid as text. Teletext could show each pattern with touching cells or with background-colored gaps; preserves the separated appearance as a character in its own right.
A practical graphics tile; its meaning lies in the six-cell pattern.
Don't confuse it with
4Questions people ask
1Can a missing glyph change which character this is?
No. If a font or app lacks a drawing for this symbol, it may show a blank box; the text still contains the same character.
How to type
𜹸\1CE78Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.
