For Sale: Campagnolo Nuovo Record groupset

if the 49t/52t chain rings combination are original to the cranks it's possible the chainset may be an earlier 151bcd (late 1960's) can you confirm if that is the case as I may be well be interested also does the rear derailleur have a patent number stamped on the top?

BCD is 144

The RD only has 'patent' stamped on the rear where the cable enters the RD. Not followed by any number.