Ok, let me see if I can answer this. Yes, my model is the art 747 and this is the start build date of November 14, 2016. So this model is from this particular era of production. Now, I do not know when this box was actually put together with the contents.
1) No plastic parts in this kit. All metal parts such as cannon barrels, the ornamentation on the stern, and figurehead all metal. Upper Deck Canon Port openings on main deck all metal. the other cannon port lids for lower decks all fabricated out of wood. All stern parts are mostly metal. In other words, as I said are NO plastic parts
2) No rigging blocks for the Cannon Carriages. I did not do this as the scale just too small. I would have had to order smaller blocks in the 1mm x 1mm or less in size to make the scale seem more realistic. to me, it is best to go without blocks on carriages rather than load up all the carriages with blocks too large as it really takes away the look.
Note: the MAIN deck had to be lowered (if I remember about 3mm) so that Cannon Carriages would sit on deck correctly. I have seen several models of this era that they modelers had to either remove the Carriage Wheels or make their own carriages because the deck is too high. The cannons will not even enter the Port Frame openings. I found this out before going further. You will see this in my log early on.
If I am following you right, you already have in your possession the art 747 Panart kit but it is from a long time ago. Is this correct? If so, then the Cannon Carriage placement issue with deck too high might not be an issue at that time.
To add more to this situation, if I had known more, I would have purchased my San Felipe from the ZHL model - their version of the San Felipe is so much better. The Panart was terrible. At first, I was very impressed with the amount of laser cut parts and all the fittings. But, it wasn't until actual construction that I ran into problem after problems.
If I can help you in any way - please let me know. I hope that I have answered your questions.