from another forum i go to
SeiyaJapan.com
SBBN013, SBDX011 (1000m diver) were subjected to diving test.They performed perfectly down to a depth of 3,000m by Kaiko7000II
SBBN013
3284m second hand was stopped
5933m Crystal was broken
SBDX011
4299m second hand was stopped
4804m Crystal was broken