Greece 1931 Athens to Assuan Aswan Egypt Imperial Airways First Flight Cover FFC

Cover postmarked Athens (4 III), with handstamped violet Greek flight cachet and printed Imperial Airways cachet, to Assuan, with ASWAN arrival c.d.s. struck on front (7 MR), further Aswan b/s (6 MR), the cover evidently returned to sender, with Skelmanthorpe c.d.s.b/s (16 MR), a lovely and visually striking cover.