A7V

There is no A7V dagger type (Garrison94).

Probably the best A7V standards are 21 LMi (HD 87696) and Altair (HD 187642)

MK43 lists Alf Aql (Altair) as their A7V standard. 

Cowley69 listed two A7V standards (21 LMi & Iot UMa) and two A7V-IV
standards (Altair and Alf Cep).

Cowley74 listed 21 LMi, Alf Cep, and Alf Aql as their A7V standards.

Cowley76 used Altair = Alf Aql as their A7V standard. 

GrayGarrison89 lists standards 2 Hyi (A7V) and 21 LMi (A7Vn)

Morgan65 classified one Hyad as A7V: HD 27934. 

Abt68 uses Coma T60 as the A7V standard. 

Gray01/03/06 lists 12 A7V nearby stars. They have median HIP colors of:
<B-V>(A7V) = 0.205 (+-0.010 sem, +-0.031 stdev; N=12)
<V-I>(A7V) = 0.226 (+-0.015 sem, +-0.043 stdev; N=12)

# No standard
Morgan65, MK73 and Keenan85 do not list A7V standards

Skiff08 did not flag any stars as A7V MK standards. 

# Best standard
HD 87696 = 21 LMi = HR 3974 = HIP 49593
  A7V: JM53,Jaschek64(all),Cowley69(stan),Barry70(UVmetal-wk),Cowley74(stan),HoukStand,Jaschek78,Garcia89
  A7Vn: GrayGarrison89(stan),Gray03(A7V(n))
  A5III: Levato78
  A5: Cannon
  A9VmA5p lam Boo: Abt95
  B-V(HIP)=0.190, dMv=+0.28, d=28pc... hence a dwarf
  GrayGarrison89 list it as their high-vsini A7V standard
  Strong A7V pedigree (JM53,HoukStand,GrayGarrison,Gray03)
  Only one Teff estimate: 7839K (Gray03)
  Should we be concerned about Abt95's lambda Boo classification?

HD 187642 = Alf Aql = Altair = HR 7557 = HIP 97649 
  A7V: MK43(stan),Cowley72(stan),Cowley74(stan),GrayGarrison89(A7Vnn),Garrison96(A7Vnn),Gray03(A7Vn)
  A7IV-V: JM53,Jaschek78(JM53),Cowley69(stan)
  A5: Cannon
  A5IVn: Abt95
  A6Vn: Palmer69 
  A9V: Barry70
  Jaschek64 is split evenly between A7IV-V and A7V
  B-V(HIP)=0.221, dMv=+0.08, pi=194mas
  There is broad agreement on A7 subtype, and mostly on luminosity class.
  MK43,GrayGarrison89,Gray03,JM53,Cowley69 all say "A7"

# Secondary Standard
HD 76644 = iot UMa = 9 UMa = HR 3569 = HIP 44127
  A7V: JM53,Jaschek64(all),Cowley67,Cowley69(stan),Barry70,Gray03(A7Vn)
  A7IV: Morgan72,MK73,Garcia89,GrayGarrison89
  A6V: Palmer68
  A5: Cannon
  B-V(HIP)=0.223, dMv=+0.16... so it is probably a dwarf
  Spectroscopic binary. Basically A7V until ~Morgan72, then A7IV since until Gray03
  Beware! M2V component "BC" 3.7" away

# Weak standards
HD 71297 = 2 Hya = HR 3321 = HIP 41375
   A7V: GrayGarrison89
   A3/4IV: Houk99
   A5III-IV: Jaschek64(Malorada75)
   A5: Cannon
   kA5m: Cowley68
   F0VmA6: Abt95
   kA8hA9mF0: Abt85
   Kennedy83 lists 3 published A5 types 
   GrayGarrison89 lists it as their low-vsini A7V standard 
   Note that GrayGarrison89 say "2 Hyi" in the standard list, but their
   larger table 2 lists "2 Hya" as being A7V. SIMBAD does not list a "2 Hyi"
   B-V(HIP)=0.218, dMv=-0.14.. so it is a "dwarf"
   While GrayGarrison89 list this as an A7V standard, *no one else* 
   has called this an A7V. So perhaps not the best standard?

HD 6961 = tet Cas = 33 Cas = HR 343 = HIP 5542
  kA6hA7mF0(IV): GrayGarrison89
  A7V: JM53,Jaschek64(all),Jaschek78,Garcia89,Hoffleit91
  A7IV: Cowley69
  A6V: Palmer68
  A6IVs: Barry70
  A5: Cannon
  B-V(HIP)=0.170, dMv=-0.67... star is slightly above main sequence
  So in general, "A7" is agreed upon by JM53 & GrayGarrison89
  Probably could be considered "A7IV/V", but maybe not the best standard
  
HD 203280 = alf Cep = HIP 105199
  A7V: MK43,Palmer68,Cowley74(stan),Garrison96(A7Van)
  A7V-IV: Cowley69(stan),Jaschek78
  A7:Vn: Abt95
  A8IV: Barry70
  A8Vn: Gray03
  A5: Cannon
  Jaschek64 lists mix of (A7V, V-IV, & IV-V)
  B-V(HIP)=0.257, dMv=-0.73, d=15pc
  Subtypes shifted a bit A7=>A8 and it appears to be slightly evolved
  Probably best considered a "A8IV-V", and probably not the best standard

Coma T60 
  A7V: Abt68
  (need to follow up)