From the previous photo:
This is actually an 18-plane trans-Pac from San Diego to Pearl Harbor on 1938-Jan-18. VP-9 had six PBY-1s (BuNos 0137-0142) and VP-10 had twelve PBY-2s.
BuNo 0138 was transferred to VP-12 on Jan-17 in exchange for BuNo 0155. They must have really hustled to get 0155 re-painted in time!
Flt led by Capt Marc Mitscher, ComPatWing ONE
48 A/C - largest grp of A/C to fly 3000 miles
Fm: Capt C.W. Swanson, USN (Ret)
(Photo from the R.L.Lawson collection, courtesy of the Nat'l Museum of Naval Aviation)