Japan

Printed with short serifs letters on greenish blue.
With Japanese Kanji characters "航 空 郵 便"

Size: 22mm x 42mm, bad perforations, ungummed.
Gunther Mair catalogue: JPN-A-6a (1960)

Printed in dark-violet blue background.

Size: 20mm x 40mm, rouletted, gummed.  

Mair Catalogue: JPN-A-6b (1960)

Printed in a variety of blue with Japanese "航空"

Size: 15mm x 40mm, self-adhesive label.  

Mair Catalogue: JPN-A-9b (1980)

Size: 15mm x 40mm, self-adhesive label.
Mair Catalague: JPN-A-9c (1988)*

Size: 15mm x 40mm, self-adhesive label.
Mair Catalague: JPN-A-10 (1988)