Netherlands 1933 lot of 3 airmail 7 1/2 ct franking covers with airmail labels and arrival cds:
1)1933 KLM 1st flight TO Belgium Rotterdam to knocke (Zoute). Aug 7, 1933 special cachet in pink on taxed  mixed franking cover.
2) 1933 Jul 24 Hengelo to France special egg cachet on mixed franking cover.
3) 1933 Amsetrdam to England