50 years ago: September 1973, Skylab-4 Speedmaster Mk II Skylab-4 Scientist Astronaut Edward Gibson makes notations at the work station simulator of the Apollo Telescope Mount at JSC - Johnson Space Center, Houston. SL-4 was launched in November 1973, with besides their NASA-issued Omega Speedmaster , Gerald Carr wearing a Movado Datachron HS360 automatic chronograph, William Pogue wearing a Seiko 6139-6005 automatic chronograph and Edward Gibson wearing a second Speedmaster. Whether the latter was a Speedmaster Mark II remains hard to tell as no onboard photos were found but Gibson wore his Omega Speedmaster Mark II during complete Skylab training and immediately post-landing in February 1974 ! (Photos: NASA)














