Hello and very good evening to you all fine people!!
I have just serviced an put together an Omega cal.562
And it goes like on the first photo with dial side up.
And like this on the second photo with dial side down.
Somebody that have had same experience with this caliber before??
Which as you wrote them are the same part numbers. Now, I had answered this before, but can do that again it here.
Tecnically speaking there is no designation such 7S26 and no letter. Since its introduction, Seiko has placed a letter at the end, that is A, B, or C in chronological order of introduction. When someone refers to 7S26 and no letter, in a technical context that can introduce ambiguity.
To help on the matter I have summarized all these changes is a document, here's it again:
Just go on Ebay or the Internet and search for the P/N detailed in the document above. You may need to add or omit both the leading zero and the separating dot in order to get all matches.
Note, you can be asked ridiculous prices for either new or used individual parts. The best approach is to get a complete mov't or watch for cheap, and use it as a source of parts.
No it is not, and the notes in my document explain why.