[Stony]

information from the seiko casing database is partly available online:

http://www.boley.de

click tab - EASY REFERENZ and a Seiko window appears enter the case number or nothing for all cases.
I think there's about 30000 casings overthere, I was happy to find some info unavailable in my '77 csing guide.Unfortunately no 4006 calibres somehow....

Site is in German, but you will probable get the meaning.

Just in case:

Glas = Crystal
Krone = Crown
Bodendichtung = Case gasket
Glasdichtung = Crystal gasket

thanks to Dave (7s26b) for the tip!

 

[The Martinator]

OMG, Stony! You're a lifesaver!! :bravo_2: :bravo_2:

 

[Klocksnok]

Hi, from a newbie divers-collector! Probably common knowledge nowadays (2014), but boley.de is also in english, though of course the german way; thorough. A lot of swiss brands, and Seiko and Citizen (why seems Orient often to be in the shadows?) are searchable, or their calibers, or their cases, parts, etc. But fellow watchmen! If the amateur wants to buy affordable quality gaskets, crystals, and o-rings, to a bunch of Seiko 6309-7040 in order to get them swim- and snorkable again. Where should he, or she go?