BK117...Bo105?
B = Bolkow (AKA Bo)
K = Kawasaki
Kawasaki builds the basic Airframe/Cabin - and ships them to Donauwoerth for assembly by Bolkow (even the US Army ones)
The assembly "Lines" for the US frames were interspersed with civil frames, I was there when they went through, but I believe the US frames had a block of numbers allocated to just that contract. The only real difference on delivery was the external finish. Secure Radios & any special role equipment fitted in the states I think?