I think this is a 1910 special movement put in an 18k 1929 pentagon at Gruen for a presentation watch order in 1929. Dial original gold alloy with 100 years of oxidation. Madretsch source did not make many Verithins? Does mark D G & S mean made before 1910? What is the ccw arrow marked screw for near winder wheel? Photos will not load. Mvnt. is gold plated engraved 17j like 50th. serial 140,ooo+. Madretsch marked. Extra precision. chronometer balance. Dial looks like solid gold alloy deeply engraved with black paint numbers. One photo did load after 10 minutes. Fine image quality takes time.
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