Sōichirō Honda - 本田 宗一郎17-11-1906 - 05-08-1991
If you don't have a "secret key", then you do not have to enter anything there.
Tagged in c310a, dutch
Workshop manual for Honda C310A (Mk. 1, 2 and 3)
Dutch version, scanned and uploaded by Hans! Thank you very much!