Seiko 6138-8020

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Hey, I have a few questions for anyone who has the seiko 6138-8020 chronograph.
- What is the lug-to-lug size? I've heard the diameter is 40mm, but the lugs don't look very long.
- Is the blue on the dial closer to black or to blue?
- Lastly, would it be a good alternative to the omega ck2998 2016?