Madagascar: Airmail labels 3

Some more airmail labels from Madagascar with different varieties of references.

Year: 1937, Ungummed. Günter Mair's catalogue no: - MDG-A-3d, perforated 11, sheets of 30(3x10)
ref.: "P.T.T. MADAGASCAR   E. N° 131" with varieties: P.T.T/P.TT/PT.T./P.T.T./EN°/EN.°/E.N.°
black/grey-blue, 4****

Each label has different variety of PTT

Year: 1948, Ungummed. Günter Mair's catalogue no: - MDG-A-3i, perforated 11 ¾, sheets of 15(3x5) ref.: "P.T.T. MADAGASCAR   E. N° 131", black/light yellow, 4****

P.T. . variety or error (missing T)

Year: 1948, Ungummed. Günter Mair's catalogue no: - MDG-A-3j, perforated 11 ¾, sheets of 15(3x5) ref.: "P.T.T. MADAGASCAR   E. N° 131", black/cream, 4****

Year: approx.1980, Gummed. Günter Mair's catalogue no: - MDG-A-8b, perforated 11 ½ , sheets of
30(5x6), ref.:"P.T.  MADAGASCAR E. N° 131", black/grey-blue, 2**