Has anyone out there ever owned or seen a Brno Model ZP-47 or 49 side-by-side shotgun in 20 gauge? I own both in 12 and 16 but have never seen a 20. I have in my workshop right now, a double rifle built either by or for Milan Machacek, Brno, on a Brno side-by-side action. This action is smaller in all respects than both the 12’s and the 16’s. Frankly, the only difference between the 12 and the 16 is the width of the breech balls. The date stamp on this action is 1948, about 10 years earlier than all of the mid-50’s to 60’s guns that I’ve seen.