VC will not provide detailed production information to anyone, so even if you ask, they will not tell. They do not even give that information to Alex (our leader here and VC employee).
I'm glad you found a new Ref. 47032! I am not good with remembering numbers, but a simple online check tells me that the original retail price was around US$105K. You can check the Auction Houses for what they sell for on the secondary market. This will give you an idea of how they are perceived today.
The three watches that you are comparing are quite different, so I find it very difficult to compare:
Ref. 47032 is a PC with Retrograde Date, open-dial.
Ref. 47120 is a Chronograph
Ref. 47112 is a PC Chronograph
Personally, if I already had a 47247, and money was not an issue...I'd go for the 47112P. I love the moonphase on this watch. It uses Cal 1141QP, which is based on Lemania's well known ebauche that has been one of the top chrono movement for decades. The Ref. 47120 also uses Cal 1141, just no PC module.
Just like picking queues to line up in, I am terrible at picking "investment" watches. It is like the stock market, many believe they can consistently pick winners year after year. But these "experts" never, consistently, do better than picking stocks by throwing darts at the stock listing pages in the FT or WSJ.
It is almost impossible to predict what tastes will be like 10,20,...50 years later to know what pieces are better investments. A couple of examples:
Steel, vintage, versions of the top brands seem to be very popular and do well at auction, because they are rarer than their gold counterparts. But when they were initially produced, it was because precious metals were restricted at that time...it wasn't a conscious effort to create a rare "investment" piece.
Original Rolex Daytonas are very sought after now, but when they were first sold...nobody wanted them, they were considered a market failure. They were often the only Rolexes available at a discount in order to move them. But because of this, their production quantities were lower...which leads to their desirability now.
So my best advice is to pick what makes you feel the most comfortable and happy. If you can, try all 3 watches on and see if one seems to attract you more than the others. If yes, that is the one that will give you the best return on your purchase, because you will be more happy with it on and you will want to wear it more often.