Lund (?) Open Crownwork Bone Set c1830

A beautifully executed "open crownwork" set, with the kings' crowns having been hollowed out.  These are relatively common in ivory, but very uncommon in bone - I think firstly because bone is likely harder to carve to such intricate detail compared to ivory, but also because of the time involved in carving such detail I would imagine these were not cheap sets and therefore the best material would usually be used.  Or, of course, the other possibility is that bone sets didn't stand the weathering of time and play, and were discarded in higher numbers compared to the ivory sets.

Kings would have stood at just under 4.6" originally, thought the white king has had a stem repair where a small turned section has been removed.

I don't think the set can be attributed to a maker easily, though I have described as "Lund" with a question mark.  Some features point me this way - one of the most obvious is the form of the kings' crosses, which match very well to stamped Lund sets. The knights are nicely carved, and also remind me of Lund style knights, though they also have hints of both Calvert and Jaques (and have a familial resemblance to some other knights I have which have been inconclusively attributed to Calvert by a couple of very experienced collectors).  The queens sport a feather finial, which can sometimes be called "Lund" style, though other manufacturers also copied this motif (such as Jaques).  Dating wise, I have said circa 1830, because this fits with the style which was popular around that period.  But could be plus or minus 20 years!