Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Italian Colonies - Tripolitania - Zeppelin Flight - 1933 (May 29), Italy Flight mixed franking registered cover from Tripoli to Rome, franked by 3 Tripolitania air post values, including Zeppelin 5L purple, and two Libyan Sibyl stamps of 20c green (one - on reverse), violet confirmation cachet and Rome machine arrival is on reverse, VF and scarce franking, Sieger #213B var, Est. $300-$400, Scott #C10-11, C22