Sister in law was pretty certain it was 120 or 130 so I was puzzled as I was expecting the 1 per 50 rule. She is off to Rome now so I will check with her when she gets back - or maybe she will get some info from the Rome bound crew.
She did say there was a pilot (presumably dedheading) sitting at the front of the business(?) section. I see in the rumours section a pilot did the safety briefing on a 747.
I wonder if necessary you could have a spare pilot make up the 1 in 50 rule.