Audemars Piguet Royal Oak Yellow Gold Grey Dial ref 4100BAWhen it was launched in 1977, the reference 4100 was the third iteration of the APs iconic sports watch and the first to feature a centre seconds hand and at 35mm, was aimed at those that believed the Jumbo was too large. We have discovered another of these beauties that we know you all love so much. This 35mm reference 4100 is in yellow gold and is in great condition. The Stern made slate grey petit tapisserie dial features the old style Audemars