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A friend acquired a pair of scuba cylinders some time back which may have originated in France - they certainly were brought into Australia by a Frenchman sailing the Pacific. It used to be the case that if you brought in cylinders which were not manufactured to AS1777, that one of them had to be destructively tested and the standard assessed before the remaining cylinders could be filled locally. Now, to have them accepted for filling here, they must be manufactured to one of a set of recognised international standards. Trouble is the interpretation of the cylinder markings. I'm hoping that someone on the net might be able to interpret the markings for me and give me a clue as to what standard the cylinders are manufactured to and who manufactured them. They cylinders are white steels, manifolded together with a single regulator attachment stem and a J valve. They have Scubapro emblazoned on them, but I presume that is who marketed them. Although I haven't seen the valves out, they look like they're probably a standard non-tapered thread by the neck shape. The cylinders bear the following stamps, in roughly this configuration: AS3 PE266BAR PB 12.80K 4 A15AIR 4A.66259 PS175BAR C10.1L There is what looks like a 'degree' symbol after A15 before AIR. 4A.66259 is probably a serial number, with the other showing 4A.66232. There may be a manufacturing date stamp of 73 on one on 74 on the other, but these might be test markings instead. I understand the weight and the water capacity. Is PE the test pressure and PS the working pressure? Does anyone recognise any manufacturer or standards markings? Feel free to email me directly, as the answer is probably of little interest to this group. Greg Ryan gregr@cs*.su*.oz*.au*
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