[Tainan]

I have that exact same model setting on my desk right now.

Anecdote: This piece is the result of a contract 'accident.' The auto-open part was supposed to be on the "shroud cutter" - the hook thing part.
This was meant to hook onto the vest of paratroops and meant for ease of one hand operation in the event of a chute failure and the need to cut it away in an emergency - one-handed. Then deploy the safety chute.

[virgil283]

"...The auto-open part was supposed to be on the "shroud cutter" - ..."

Thanks I did not know that.

A buddy and I found one in the grass beside a road back when we were in high school, but I don't know what became of it.