I have a Bird 4391 (not the "A" version) RF POWER METER For Sale.
Comes in Foam lined transit case, NO Slugs are included. There are
NO Batteries included, but the AC Line Cord is included.
I checked it against my HP 436A calibrated Power Meter, using one of my NEW Bird Slugs and it reads spot on.
Asking $250, shipped CONUS.
Tnx es 73, Dick, W1KSZ