There were some really fine tiny 10 lyne size pendant watches from Gruen around 1900. Considered to be miniature pocket watch today. Actually I just discovered the Gruen Guild marked lower cost 716 I think is 14 lyne is smaller than the Ultrathin, Very-Verithin, Verithin, 17 ligne sizes. (~10 size) Bought one for parts with broken spring thought was larger Semithin. Gruen Guilds are mostly 17 lyne Semithins a little thicker than Verithins but fine quality at lower cost than Verithins.