Air Mail on piece 1919 (Jan.) front carried on first England-India flight from Martlesham Heath to Karachi, showing "FIRST THROUGH AERIAL MAIL/GREAT BRITAIN TO INDIA/KARACHI 14. 1. 1919." in red and with day of month altered to "17" in manuscript, bearing ½a. with light Karachi c.d.s., Muttra arrival c.d.s. alongside and censor cachet in violet. Scarce