Seiko & Citizen Watch Forum Message Archive

Hi all,

I was just reading through the "Seiko Diver Reference" page (wonderful site from Kevin Chan) and came across a nice, though unfinished, thread on these items. Well, my "new" 6105-8000 fits the thread and I was wondering if any resolution to the questions had been found:

My watch info:

6105-8000 WATER PROOF (on caseback)

8723480

JAPAN X

6105A mvmt (does not hack)

dial says "WATER 150m PROOF"

OK, do I read the 7 digit serial number in the same way as a 6 digit.... 1968, July, #23,480?

What does the "X" signify?

When did the changes (Water Proof, 7 to 6, etc) take place?

Just how rare is this thing?

Thanks for reading,

Brandon