1936 2f yellow-green in pair, one irregular perf., on cover from Yenki (Manchukuo) to Solothurn (Switzerland), scarce (Image)

1936 Group of 19 small blank leaflets, all but 2 franked 1 1/2f or 3f of Manchukuo-Japan Postal Treaty Issue bearing special commemorative cancel (sometime first day) of the different Manchukuo post offices, probably from a special booklet