Well, there is an attribution guide, but primarily the coin must have a B reverse (flat breast, parallel top arrow feather), usually "LIBERTY" in the head band is doubled, and with about 2 exceptions, you can see "doubled tailfeathers." If you want me to be even more specific let me know.
6. 1878-P 7/8-TF VAM 32 "7/3 TF Variety". As the 2nd rarest 7/8TF variety, the VAM 32 is not only rare & desirable, but it's a heavy premium coin. 7. 1878-P 7/8-TF VAM 41 "7/7 TF Variety". VAM 41 has the most complete set of extra TFs of any 7/8-TF, and is therefore popular as a 7/8-TF example. 8. 1878-P 7/8-TF VAM 44 "7/5 TF Variety". Tripled Obverse. Known as the "King of VAMs," the VAM 44 is Ultra-Rare in BU. Sought after in any grade. 9. 1878-P 7/8-TF VAM 45 "7/0 TF Variety". Not a spectacular variety, but the third rarest 7/8-TF. Eagle's legs are doubled to left. Found on many Hit Lists.
Sorry Gilbert, I guess I got carried away with the pointer
Comments
7. 1878-P 7/8-TF VAM 41 "7/7 TF Variety". VAM 41 has the most complete set of extra TFs of any 7/8-TF, and is therefore popular as a 7/8-TF example.
8. 1878-P 7/8-TF VAM 44 "7/5 TF Variety". Tripled Obverse. Known as the "King of VAMs," the VAM 44 is Ultra-Rare in BU. Sought after in any grade.
9. 1878-P 7/8-TF VAM 45 "7/0 TF Variety". Not a spectacular variety, but the third rarest 7/8-TF. Eagle's legs are doubled to left. Found on many Hit Lists.
Sorry Gilbert, I guess I got carried away with the pointer
Vams 15 and 23 are 8tf varieties.
The "doubled tailfeathers" or 7/8s run from 30 - 45.