Rolex Movements: Same Watch, Different Cases?

[Marrk]

This thread

http://www.rolexforums.com/showthread.php?t=43598

touches upon something I've been thinking about lately. If we were to make a list of all the Rolex models and the movements they contain,

1) how many references would share the same movement?

2) if it's the same movement and only the case-bracelet-decoration is different, how do you feel about that?

Example:

16710 GMT II M-series = cal. 3186
16570 Explorer II M-series = cal. 3186

Example:

16610 Sub Date = cal. 3135
16600 Sea Dweller = cal. 3135

Example:

Air King, Expy I, Sub No-Date = same calibre (Is this true? I might not have my facts straight on this one.)

Aren't these the same watches in different cases? . . . Personally, I can't make up my mind if this is good, bad or a non-issue. So, I welcome your thoughts.









P.S. This thread is not meant as a criticism of Rolex or the above-mentioned references. I like 'em all, esp. the tool watches.