"Tomahawk bone"?
I don't follow.
That looks cooked about medium, either that or your wife seared it perfectly. Nice!
I'm a big fan of the half pint mason for my cabernet sauvignon too. Stem glasses are for uppity peasants. Here is a bit of a culinary seccret- kings drink their mead from a cup you can screw a lid onto. Its true. Anything poured in a stem glass immediately turns to cat urine. Some snobs think the wine glass serves some kind of mystical purpose, but its real origin was to separate out the cup with the hemlock in it.
IMO most steaks should be cooked only until the steer's heart stops beating, but with fatty steaks like ribeye medium works too.