Old Oak Sideboard

I'm trying to determine how old this is and what the style or design is called. My dad bought it as an antique when he was stationed in Tacoma Washington during WWII. He always referred to it as his antique sideboard even in 1958 when I was a kid.

Inside the drawers and bottom cabinets it's till very dark stained oak. My dad said the whole thing was finished that way when he bought it, but he refinished the exterior with what was popular at the time he bought it, sandblasting off the finish and refinishing it with white lead stain.

Poor