Check out the instruments and the layout. On the Captain's side note the biggest and most central location is occupied by a HUGE compass. When I first went into KC-135s, they still had this layout in 1970 and it was the tail end of the era of the GCA. With that big compass you could easily see 1-2 deg heading changes. It was amazing to see the different ways guys used that big ball. Some would put the runway heading at the top and you would then basically 'see' the pattern you were flying. Others REQUIRED the current heading to always be at the 12 position.
When we got the super-duper wowie-zowie COLLINS FD-109A flight director, the old heads scoffed and said, "Flight DIRECTOR? Hell, it don't direct anything and it sure as hell ain't needed! .... just another crutch for a p*ss poor instrument pilot!" Harumph.
Long time ago.
Two guys in my UPT class got -133s. They later got -141s. Must have been a big change.