I've been researching the Polish moro patterns over the last few years and decided to write up a short article as a reference.
My key findings over the last few years:
1. Purple moro pattern used by Prison service that I discovered in about 2006.
2. Confirmation that the Black Moro pattern was used by the Navy, Air Force and Air Defence Forces.
3. Disentanglement of the three Police patterns: Blue, Blue Green and Grey moro. Differences between the Blue and Blue Green moro patterns I only discovered recently through research on Polish forums and comparison of examples.
4. Recent discovery of the Brown Moro pattern. I have no information on which service used this pattern. The 3 examples of uniform pieces I have are constructed similar to MSW uniforms of the 1970s and 1980s. Buttons also indicate communist period use. I will document these uniforms soon. Interesting and unknown pattern.
*By discovery I don't mean that no one knew of their existance, especially in Poland, I just mean that I found this information out through research and comparison of items in my collection, especially the markings stamped in the uniforms.