Note the 'flow through' engraving on the coverplate of this example, often the coverplates are unengraved.
The rarest of tricones, the style 3 'Lilly of the vally' engraving was only a few dollars cheaper than the top of the line style 4, and so it seems most purchasers paid the extra and bought style 4 instruments.
Although this example sports a pearl shield on the headstock, some style 3s have a MOTS overlay, and it seems that the style 4 and 3 headstock design were fitted to either instrument at the whim of the makers or at the customers request.
