Specs on Day Date Speedmaster

CKS_TX_NY · May 15, 2025

Hello,
I’m new to this forum. I seeking specs on range of Black Omega Day Date models. I’ve found quite a bit, but not able to find case thickness, listed by model and year.

I see Day Date had models 12mm thick but no year listed.

Models I see for sale on Chrono 24 and EBay are generally listed with 14mm case thickness.

Any suggestions of where to find info would be most appreciated.

Thanks,
CKS
Houston TX

bsowers34 · May 15, 2025

Never measured mine, but the 39mm size fits a smaller wrist like mine very well.

dougwhiz · May 15, 2025

Mine is the model above. It measures 13.7mm thick from caseback to the top of the domed sapphire crystal. Here's a sideview pic from the Fratello article on them. It shows how the crystal and bezel angle downwards that helps to visually flatten it. But it also fits so well, it doesn't wear thick like some other chronographs I've had.

This is a good article on the Mk40s, but I don't think they mention thickness specifically. I usually google a specific reference and find the answers that way.

https://www.fratellowatches.com/speedy-tuesday-omega-speedmaster-day-date-mk40/#gref

CKS_TX_NY · May 15, 2025

bsowers34
Never measured mine, but the 39mm size fits a smaller wrist like mine very well.

Very good, thank you.

97TJ · May 16, 2025

I have a couple mk40's, but here's what I believe the the 40mm Cosmos (some say 39mm, some say 40mm) like you have pictured look like on my 7.25" wrist for reference and next to the Pro, if that helps?

CKS_TX_NY · May 16, 2025

97TJ
I have a couple mk40's, but here's what I believe the the 40mm Cosmos (some say 39mm, some say 40mm) like you have pictured look like on my 7.25" wrist for reference and next to the Pro, if that helps?

Wow, really helpful. Thank taking the time. That’s very helpful.

padders · May 17, 2025

The Date and Day-Date (Mk40) Speedies wont be super thin as they are based on the Valjoux 7750 movement which is a bit of a fatty. They did well to get it down to 14mm. Some 7750 based stuff is very chunky indeed.

CKS_TX_NY · May 17, 2025

padders
The Date and Day-Date (Mk40) Speedies wont be super thin as they are based on the Valjoux 7750 movement which is a bit of a fatty. They did well to get it down to 14mm. Some 7750 based stuff is very chunky indeed.

Very helpful, thank you.

Walrus · May 17, 2025

I always keep a day date on hand. I they are good bang for the buck and after having one stolen I bought another one here to replace it. I like the specs never thought of them “too chunky” but not particularly thin. I like your model and would consider one I just find the dial a little busy. That’s subjective of course.

https://www.passions.com.sg/v2/watc...-yellow-dial-automatic-date-chronograph-steel

Specs on Day Date Speedmaster

CKS_TX_NY

bsowers34

dougwhiz

CKS_TX_NY

97TJ

CKS_TX_NY

padders

CKS_TX_NY

Walrus

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