The 300M Era: The specific Seamaster Diver 300M line, to which the 2599.80.00 belongs, was launched in 1993 and quickly gained popularity for its robust design and reliability. Functionality: Includes a chronograph function with three sub-dials (located at 6, 9, and 12 o'clock), a helium escape valve at the 10 o'clock position, and a scratch-resistant sapphire crystal.
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