I keep viewing ironhead Sportster heads on Ebay - and the seller describes them as "Branch heads" and they aren't...not even close. Branch heads (at least all the one's I've seen):
1. Have numbers stamped near the intakes (on the bottom)
2. Have micro, knife edge cut valve seats
3. Have mirror polished ports (both intake and exhaust)
Later heads have a smooth intake, but unpolished as much...
4. The head gasket surfaces AND rocker box surfaces
are both surface ground (parallel)
for straightness and squareness