[kj] BTATS symbol - again

[fatpotanga]

This is possibly one for Uncle Al...
As I can't keep calling it Robert forever, does anyone know the name of the
symbol on the inner of BTATS?

The subject of it's meaning was broached aaaaaaaaaages ago but it kind of
went all cryptic and as I'm craptic when it comes to cryptic, I thought I'd
ask again as, from the moment I saw it it's fascinated me.

Curious George Potanga