Help identify this mango

[Kona fruit farm]

I picked up this mammoth mango at the island naturals market in Kona.  Sign just said "local mango". For reference I have a Rapoza mango (average size) next to it.   This mango weighed 3 lbs.   I initially thought it could be a Keitt from the sheer size.  But it seems like the shape is more like an R2E2.  I dunno.   Any ideas??