ORP Czapla was part of the second series of Jaskółka-class minesweepers.
Notes on verification
Corroborated by two sources describing a later batch of two additional Jaskółka-class ships (Żuraw and Czapla), consistent with the claim's substance, though neither source uses the exact term 'second series' and one source (marketplace listing) is not a rigorous historical reference.
Sources
- ORP Czapla (en.wikipedia.org)
- https://military-history.fandom.com/wiki/Jask%C3%B3%C5%82ka-class_minesweeper (military-history.fandom.com)
- https://marketplace.secondlife.com/p/WW2-Minesweeper-ORP-Jaskka-class-version-13/4002032 (marketplace.secondlife.com)