Looks like you received the first "Mark II" version of the tool. Kudos. (and maybe the last tool available)
The very rare and valuable tool is now safely tucked away in my tool chest. Fingers crossed apart from going through my spare set of carbs it won’t be needed anytime soon.
I admit to being a “tool tart” and despite being able to borrow my mate Martin’s carb tool anytime I need it it’s nice to have my own