it should have stamped on hse or dot, hse is U.K standard and dot is US standard, you will not get dot bottles filled in this country, the only way is to have your own fill rigg and fill it that way,
i have an angel air tank with neither dot or hse stamped anywhere on the visible portion. is that where it would be stamped or do i have to peel the sticker off the other side??
it says
0.625-18unf-2b usa luxfer hx225 un nr 1002
1.22kg 1.1L pw345ph517bar AA6061 breathing air
EN12245 0044-379/03 D (wavey double T thingy here)0035
circle with 0tv1 in it 2003/09 4 red arrows 08
final 2018/09
luxfer p/n p12e-1
then some torque settings and a periodic date inspection bar
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i should really get in the habit of finding out first before i buy stuff
cheers