Case, crown and pushbuttons |
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The case of the Omega changed in size three times (see also : History of the Speedmaster). The first Speedmaster, the CK2915 was used till 1959. After that, the CK2998 was produced, and was slightly bigger. Since the Professional-mark is on the dial, they use a bigger case (42mm instead of 40mm).Look below for the images.
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The winding crown (with Omega symbol) has
changed in size also. The pictures below are showing it. |