Here's a question for you both (Dennis and Hoi)
If OM is for solid gold in french, for the dials that are solid gold...
On the pre-BA/BB/BG references, they use OG for white gold and OT for yellow gold... what does the G in OG mean and the T in OT mean? I had imagined OG would be "Om Gris" or gold-grey but can't find anything related to yellow that would fit the T in OT.
I know in Patek-land, G is white gold, J is yellow gold, P is Platinum and R is rose gold, that fits with the G in OG but thats about it.