Just bought a utilikey this weekend and it's made in china also (the demo they had was made is US as well as the rest of Swiss-Tech line in demo all US)and doesn't have any kind of number on it. still a very nice addition to my keychain without any noticeable weight addage seems to be well built as well.
I think mine follows Stormedrane's "Patents Pending" version.Mine is marked "Patented and Made in USA by LKL", with no number.
Welcome and some good info there. Nice work