I have that very same brochure-I picked it up at a dealership in '69 and kept it all these years-back then I dreamed of owning a Thunderbolt.
The serial 3 on this bike is A65L NC13xxx. The title calls it a '69, but who knows? the bike has most definitely not been repainted. The sidecover decal is not the same style as in the ad,though. I'd like to know if this is a "real" '69 or not.

2007 Royal Enfield Bullet
'67 triumph T100R
'40,'44 BSA M20s
'97 Ural Tourist
'80 HD XLS Roadster
a few others