Yes, there are some good shape references in some of the books. But all of these need to be examined in context of the other features, as shape cannot be used alone to positively identify a particular maker.
Ok, if we find a tall, tapering weight with overall faceting this could give a big clue to its origin as 20th century Hungarian - but it might also be Czech. A good example of confusion, which arose a few times a year or so ago on eBay, were some "bullet-shaped" weights that looked very much like the Strathearn "Tropic" design, but which were found to be of modern Portuguese manufacture.
The problem is genrally more complex with modern weights than with the antique ones since so many variations have been produced.
And even with the known illustrated shapes, there are often examples from the same maker that do not fit the norm.
And then there's the difficulty with repair work, done to remove chips and deep scratches from the antique and older ones, which can sometimes alter the profile such that it no longer looks like it should when compared to the books.
But there is one range that may, possibly, perhaps, be standard and can be used as a fairly accurate reference. These are upright rectangular weights (blocks) containing complex floral bouquets. If one of these is found, it is probably Russian - and worth a dollar or two.