And that's why there is an ops manual usually. A company can have an ops manual, it does not need to be FAA approved under 91 rules, and my point is they will tend to have one to keep insurance rates low. Airplanes without one cost more to insure, period. That being the case, claiming you flew right seat on one calls for some extra proof- if you flew with someone who is self insured or obtained a great deal on insurance somehow which allows anybody to fly right seat, you need to make that clear when you show a prospective employer the SIC time. Something like "I worked for so-and-so in his Bravo under 61.55 rules, great opportunity, and since it was kind of unusual to log so many hours that way I also had him write me a letter of recommendation to support it".