Gaucha IGA 410 bore choke

[teberle]

A Gaucha IGA shotgun in .410 has recently entered my possession. I've been trying to figure out what kind of choke it has. On the bottom of the barrel underneath the fore-end stock, there are three stars stamped. My googling has led me to believe that these markings refer to the choke, but the best explanation I could find was in the FAQ on the Stoeger website (which imported this gun), and refers to 'notches' instead of stars. This is presumably referring to current production Stoegers, and not the Gaucha. Can anyone shed some light on what the three stars mean?