scratchbuilt 64 gun British warship

Well, yes, it's pretty impressive, especially that rig. But I have to observe that the grain of the wood is bit too much, and the planking on the deck and counter is too coarse. It sometimes baffles me how certain parts of a model can be done to a higher standard than other parts.

..Actually, now that I have seen some of the photos close up, the hull itself is really very crude, though the decorations are quite good, and the rigging is excellent...

Pretty cool!  Looks like one of those old 'Navy Board' models built before or during the actual ship building.  Yes, the flags are definitely all wrong for the 17th century as previously noted, and there might be a bit of a problem with proportions too (underwater lines look to shoal for the topsides, but I could well be wrong...).  If you like these, there is an excellent book that you might find on Amazon.com or elsewhere called (not surprisingly!) 'Navy Board Ship Models 1650-1750' by John Franklin.  These models are not only stunning examples in their own right (and the detail has to be seen to be believed!), but are also the very best source of existing information not only on the methods and construction of the actual ships, but rigging details, details of fittings, design trends and changes in decorations over time, etc, etc, etc.  Beautiful book, and invaluable to the modeller looking to do a ship of this period!

Beautiful model!

Yes, the round port wreaths are appropriate for the 17th century....  but unfortunately the flags are not. The red ensign at this time would have simply had St. George's cross on a white field. The Union Jack would not have had the red saltire of Ireland within the white saltire of Scotland until 1801. St. George's cross at the mainmast is also debateable. Easily corrected though.

Still a beautiful model.

Are those round gunports correct?  Even if they aren't, there's a chunk of time and work in that sucker!