Red text on the Tachymetre bezel ?
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I think the speedmaster racing models have a rubber strap. Actually, having a look at the Omega catalogue. I think this is the watch in the photo

https://www.omegawatches.com/watch-...raph-numbered-edition-44-25-mm-32192445201001

 

Thanks ... this HB-SIA Speedmaster was worn by an astronaut I talked to last week

 

Not really looked at the racing models before, looks surprising good actually.

 

I was able to borrow a Solar Impulse Speedmaster from @Lou P last year. Titanium, slightly bigger than a standard Moonwatch, automatic, date, gmt, carbon fiber dial, futuristic fonts and a few splashes of color...A lot going on but it works. A very underrated Speedy IMO.

 

The astronaut liked this watch because of the easier-to-read Base 1000 bezel...
BTW he enjoyed his NASA-issued Speedmaster chronograph(s) for a period of almost 30 years !

 

Got CLOSE to aquiring one of these a while back .Agree with previous observations. Big SoB!

 

The HB-SIA is coming with either titanium bracelet, Orange rubber, or black rubber as pictured above. It was my first watch and my first speedy years ago. A bit of a weird one, automatic coaxial, 44mm, date, GMT etc but super enjoyable during my flight training
Bought it on the Ti bracelet but got the orange rubber not long ago and it's incredibly comfortable !