Rosicrucian Knights

The bird symbols in the book are likely an IBIS (Egyptian bird icon)
Thoth was depicted with the head of an ibis.
The SAS patch wings are based on the IBIS also.

Gary Wayne covers Rosicrucians in 'The Genesis 6 Conspiracy'

https://archive.org/details/rosicrucians00chri/page/n9/mode/1up