=====#T======Antique 18 Size New York Standard Worm Drive / Gear Mechanical Pocket Watch rare escapement with worm gear for a pinion on escape wheel and unusual made pallet fork to work off the perpendicular escape wheel. SERIAL NUMBER 26831- NO DATE LIST FROM NEW YORK STANDARD SO MADE AROUND 1890-1900 FIGURE. CASE MARKED: DUEBER SILVERINE CANTON, O.  VERY HARD TO FIND RUNNING AND KEEPING TIME WITH PERFECT DIAL. THE SET LEVER IS STRAIGHT NOT WITH THE CURVE MOST 18 SIZE MOVEMENTS HAVE, IT PULLS OUT STRAIGHT. YOU HAVE TO MAKE SURE IT IS FULLY PULLED OUT TO SET THE HANDS.