Roobarb:

I think they simply retained their miliary IDs during filming as it was all
just a ‘temporary’ arrangement only. The Spanish crash report I have from
the AF lists the military s/n only and no civil Spanish one.

Interestingly I also received a letter from a Spanish ‘civil’ department
that lists a crash at El Corpero on March 21, 1968 and lists the aircraft
as a Hispano Buchon? Was this another BoB flyable??

Sorry I’m not listing the s/n’s for everyone but they are kind of ‘under
wraps’ for my book.