Assertion or relation:
«The Chas publisher (R0053) is the same as other Prague émigré publishers (Siyach, R0052; Proboiem, R0055).»
Audit conclusion:
Refuted in dossiers R0052 and R0055: they are distinct publishers (distinct_prague_publisher / not_same_publisher_as).
Editorial explanation & sources:
According to dossier R0053, Chas was founded in Kyiv in 1908 and opened a Prague line in 1919 (imprint "Kyiv—Prague", historical address Smíchov, Karlova 13). The dossier separates Chas from other émigré publishers and journals (Knyhar, Knyholiub R0089).