Flying High: Five Watches with Altimeters | WatchTime - USA's No.1 Watch Magazine
Citizen Promaster Altichron BN5030-06E | AZ Fine Time Blog
Altichron (J280/J290) Operation guide | CITIZEN WATCH Global Network
Diamonds of London - It's 1989 and the Citizen Altichron becomes the world's first combination quartz watch equipped with electronic altitude sensor. Climbers everywhere rejoice. #MyCitizen #CitizenPromaster #TBT | Facebook