26 28 42 64 | Fraternitas Saturni, formed 1926, established 1928 + Eugen Grosche's death

https://en.wikipedia.org/wiki/Fraternitas_Saturni

Fraternitas Saturni = 233 (13th Fibonacci Number)
13, the 6th prime; Saturn the 6th planet
Gematria = 233 (Jewish Gematria)

This foundation was formed in 1926 and officially established in 1928.

Saturn = 26 (Septenary)
Mason = 26

The founder would die January 5, 1964.

1/5/1964 = 1+5+1+9+6+4 = 26

The year '64 is interesting as well.  This fraternity was associated with Thelema.

Thelema = 64
Do what thou wilt = 64 (The motto of Thelema)


Notice their symbol is Tau.


Tau = 42
Freemason = 42
Saturn = 42 

http://freemasonry.bcy.ca/symbolism/triple_tau.html