Received Parabellum Certificate from Mauro for the pair!! It's a great addition to these pistols.
I also posted the pair in a Chinese gun forum. Some members there had access to many types of C&R guns, but since Parabellum was rare in China, they did not have access to this type. All wondered why German guns being so cheap in the US
Also wondered what's special about Bulgarian Luger and Russian Luger so commemoratives were made on them..
Commemoratives were made on certain variations of Luger,,, not really based on the historical importance of those selected variations though, but based on rarity. That's more collector oriented consideration. For any type of gun, being recognized by public, having a role in the history, need production volume and wide distribution. From that perspective, both Bulgarian and Russian had tiny volume and narrow distribution. But that's exactly the reason commemoratives being made on them, not on byf 42, not on DWM 1918, etc, although those had much bigger role in history. But this can also be viewed in a broader sense -- commemoratives were made on Bulgarian, Russian, CC, Navy, etc, but they can be viewed as in memorial of all Parabellum pistols.