Still in use. Those things are tanks and last forever. The navy yard by us has a fleet of them--they are coveted and new owners/caretakers usually paint them... meaning there are bikes cruising around with enough paint to add significant weight to the bike. The users never own the bike, gov't property, and pass them along to someone else when they no longer need them or move on to another job or position. Most of the ones in use today date from the 50s and 60s.