Thunder & Colt V30 60 Litre stainless slave tank with QSO Rego valve and clean blue cover. First tested October 1988. In good condition and retested on 12th April 2012 by Chris Dunkley, PRV/PPT/INT all due April 2022. Cameron Balloons Ltd Service Bulletin No14 Colt Propane Cylinders is not applicable to this cylinder.