Latest addition to my exhibit attached here - a PC from 1914 with a coded message, which was not allowed. This is the only reported item from Wyborg censor office marked with a Ban Mark reading "НЕ ПРОПУЩЕНО" ("Not Allowed").
The card is to be included in my exhibit - which can be viewed via this link: https://filatelisti.fi/kokoelmat/tamcol ... 1914-1918/
Link to the online catalogue: https://censor.jiv.dk/