In their 1902 publication, The Hill Brothers noted both the obvious changes in Stradivari’s style circa 1710 and the more subtle shifts undertaken by the master: ‘In 1710 Stradivari had attained his sixty-sixth year, and, notwithstanding advancing age, we still see him completing instruments of that concise, neat type of form and work which we have tried to portray; but as we proceed we perceive that the whole character of the work assumes a broader and more substantial appearance. […] his age is here and there betrayed by a certain breadth and solidity of style traceable throughout every detail. Edge and purfling have a broader aspect than hitherto, due principally to the former being less rounded and the latter generally of full thickness, and set a degree farther in. The edge, as a rule, is also stouter in substance, and at times of slightly irregular thickness; the corners are decidedly broader, which causes them to appear shorter than is really the case, and their curves—especially those extending from the C’s—are at times a trifle squarer-looking. The arching of the model continues on the lines of the 1704–10 instruments; here, a shade flatter or higher; there, a little more or less full at the flanks and around the edges.
More information: Antonio Stradivari Set 1, Volume 3, Page 28