You will find that the short sleeve length is just right for showing off your watch.
Nike Dry Men’s Tank Dri-FIt Nike Basketball SZ Large Standard Fit DD9359
What I like is the lack of logos, which men often prefer for a clean look.
Nike Breathe Men’s Short Sleeve Tee Shirt Medium Polyester Blue CN8465-435
With short sleeves, you can easily layer a flannel or denim jacket over it.
Nike Men’s Short Sleeve Running T Shirt Cotton Small Black BV0625 size XL
You will find that short sleeves keep the shirt from feeling too warm indoors.