MODEL NO. AK9040-MBK MOVEMENT JAPAN OS20 - CHRONOGRAPH MOVEMENT FUNCTIONS 3 HANDS/ TACHYMETER / PUSH-PULL CROWN W/ FUNCTION PUSHERS BAND SIZE L - 8.50 IN. W - 22.0 MM. BAND MATERIAL STAINLESS STEEL / MESH / SILVER TONE, W/ BUCKLE CASE SIZE 29" X 24" CASE MATERIAL STAINLESS STEEL / SILVER TONE DIAL SILVER CRYSTAL MINERAL CRYSTAL WATER RESISTANCE 5 ATM