Skylab-4 training at the Apollo Telescope Mount (ATM) display and control panel mock-up in the one-G trainer for the Multiple Docking Adapter (MDA) at Johnson Space Center in Houston Terxas. This September 10, 1973 photo shows SL-4 pilot William Pogue and science pilot Edward Gibson going over checklists. Note that Pogue wore his personal Seiko 6139 automatic chronograph and GIbson wore his personal Omega Speedmaster Mark II chronograph with tachymètre bezel sitting in flat glass. (Photo: NASA)







