12S hunter case p.w. are relatively scarce. I have one each of the best 1900+ Elgin 190, Waltham Maximus, Gruen Aeby. The Gruen has an 80 gram Gruen made very fine, heaviest of the 3, hand carved case with 17 ligne smaller than 12s movement. Less than 100 made. Maximus was 200. Elgin made many 190. Best available from the 3 makers at the time. My choice for best is obvious. Once again, as a comparison, they are all good, and personal preferences prevail, but Gruen and Aeby soon after 1900 seriously attemtpted to make the best with German Moritz Grossmann mechanical designs and their superb case work.