Nothing simple here! And the vernacular doesn't help. I assumed three palms stamped on the barrel meant triple proof but actually it's double proof (9 grams bp x 2). What I thought was double proof is actually more like 1.5 proof (superieure). Four palms equates to triple proof (9x3=27 grams). 4 means 3x; 3 means 2x; 2 means 1.5. It's a wonder I can tell a cocking indy from a--ahem--linear striker!

jack