Another thing I noticed is that the table in the photo only seems to have a single "sight" in the rails between the pockets. Usually they would have 3, evenly spaced between each pocket.
Here is a 1973 Brunswick Gold Crown from the dealer sales book:
1962 Gold Crown:
1974 Brunswick Gold Crown II pool table:
1979 Brunswick Gold Crown III pool table:
Here is the document I use to identify the various Brunswick gold crown models. Sorry it's not a higher-resolution picture, it was given to me by a mechanic a long time ago.
It can help distinguish between Gold Crown I, II, III, and IV models.
For matching the finish, don't just go by the photos. Look at the "Finish Options" column.
You might have to print this and just go over to the seller's place if it is near-by.
Again, It looks like a decent commercial-grade Brunswick pool table, and for $400 (or even 500), I think it's a steal.