I’m not a Jaques expert but what I’ve learned is it helps to look at the other pieces as well, e.g. the bishop, and compare them with sets from the different periods. Also, there is variation in knight carvings even from the same time period. I have a Lasker set and it doesn’t look exactly like the one in the pic, although there are some general similarities. The smaller one here is the Lasker. As for the tall one, you can see it doesn’t look exactly like the Broadbent or the Lessing, although I think it’s from the late 1930s.
Has anyone put together details about the differences between late (1880-1940) Jaques Staunton knights? I have seen all of the graphics of all of the different "types" laid out in a grid, but it is not clear to me what specific areas I should be looking at to see the changes from type to type (vs individual variation). And just when I think I see the differences in one chart I look at another example of the type (like in 'Jaques and British Chess Company Chess Sets' by Alan Fersht) and the differences that I thought defined the type are no longer there.
So far the only written notes I have found on this are statements like:
The Lasker has a pronounced goatee (except it's goatee looks the same as the Hartston to me). The Hartston face is slightly dished (which part of the face?). The Marshall and Nimzovich are very similar, the Marshall being slightly squatter and straighter (I can't tell the Marshall is squatter or straighter from the picture).
How do you tell a Lasker knight from a Hartston from a Marshall, etc?