Anonymous ID: 33fbd1 Jan. 7, 2019, 8:14 p.m. No.4656388   🗄️.is 🔗kun   >>6622

>>4656099

 

At a guess 'Ultra' would refer to:-

"Ultra was the designation adopted by British military intelligence in June 1941 for wartime signals intelligence obtained by breaking high-level encrypted enemy radio and teleprinter communications at the Government Code and Cypher School (GC&CS) at Bletchley Park."

 

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