VD31 Epson Quartz Watch Movement Complication, 3 hands (110/65/20): hour/minute/sweep second, 2 indicators (14): 24 hour @ 3, dual time hour @ 9, date @ 3, total height 6.81 mm, 0 jewels, stem 351-177, cell 371. S. Epson VD31 is 12 ¾ ligne, 29.50 mm (dia.), height 4.57 mm.