|Known counterpart stations|
S26 was operated by Polish State Security of the Ministry of Interior (SB). Ceased in late 1970s, replaced by S11.
|"Cyt Cyt", performed by Mazowsze||Uwaga||67||Kreska||222||78495 78495 ...||Koniec|
|Amount of 5-figure groups in the message||/||Identifier. Always one digit, repeated thrice.||5-figure paired groups|
|Repeated twice||Repeated twice|
[Based on a letter on a letter on Simon Mason's website]