My Model Centrum PROGRES book came about a week ago and I highly recommend it. But as for being the definitive reference for the early B.II, it falls short. It has a ton of wonderful photos of two restored aircraft, both late models, one in Krakow and one in Sweden, but very little on the early B.II. I've got the Datafile on the way and hopefully it will have more information on this version. The Model Centrum book has an intriguing profile of an early B.II armed with a Colt Browning machine gun, but no photos to back it up. Hoping that the Datafile will have something on this ship.
Cheers,
Bud