Rolex 3000

The Rolex caliber 3000 can be sayed are a simplified 3035 without date mechanism, is this true? Or is the 3000 the improved version of the 3035 with its more modern balance with centered mass and flat hairpsing, they share surprisingly very few parts, most of the cal: 3000 parts fits just this caliber.

Technical data Rolex cal: 3000 (1990 - 2001).

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  27 jewels, automatic winding.
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  Size: 12.5 ''' 28.5 mm.
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  H: = 5.80 mm.
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  N: = 28.800 A/h.
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  Power reserve: 50 h.

Versions:

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  3000: no date, H = 5,80 mm.
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  3035: date, base caliber.
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  3055: day, date, H = 7,11 mm.
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  3075: 24 h display, date, (GMT Master I).
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  3085: 24 h display with indipendant set of 24 h, date, (GMT Master II).