Brand ISA Caliber 8171B Size 11 1/2 Function SC-D(6) BIGDATE-CHR 1/5S Version 2 EYES ( 2-10 ) Hands 0.90x1.50x0.20/0.16 Stem = 815 eigen Stem (subs.) Stem (2 pce) Balance staff Balance staff (subs.) Mainspring (subs.) Mainspring (subs.) Battery 395