Clearly German engineered. When hiring engineers from the Old Country (my people refer to us as such), it is always advisable to hire two of them. One to come up with all of the ideas, and the other one to tell him when to stop engineering.
Since the threads for the part which uses the o-ring can only be tightened enough to compress the o-ring, but not tight enough to prevent it from backing out from vibration, an additional device was required to prevent that.
All and all, I'd say that Otto stopped Hans from 'engineering' this device too far.
But given my ethnicity, I may be biased.
