This tool probably dates from late 1950's, has been in family since then, probably been rarely used & comes in original box.
Made in Aust. by Reg. Harrison, Alexandria, NSW. Box is marked M104 in one place & M404 in another. Now the M404 is supposed to have straight & offset feet. This one doesn't seem to have that, just 2 types of fittings which seem to cater for small & larger valves. Hope there are experts out there who can make sense of this? Don't want to dump it as it represents Australia's capacity to be make things!