[Mike K]

I have never seen that earlier prewar style of key that straps to the thigh...

If you look at the VAOS parts list for the WS11 (Aust) it should have a ZA or ZAA number for the key .

I recall when Aussie disposals had the 19 set thigh keys NOS . I purchased their whole stock , the keys were various brands and manufactured in different countries, some were made in the USA . When I got rid of my 19 sets , I didn't keep the keys .