The crew suitcase of preference for that era was the blue 'Globetrotter'
For which all the keys were marked No.3 !!
More Polar stuff.
A well known S.E.Asia airline ( Not SIA ! ) also flew over the Pole from Paris to Anchorage, and in later years used a DC-10, with the by then standard INS navigation equipment, so the principles of Astro and Grid Navigation were no longer required.
One day the DC-10 went sick and was replaced by a 707, the crew knew about Grid navigation and gyro steering and when they eventually passed the Pole and saw the snow covered coast of the North Slope of Alaska appearing at ETA, were confident that they were only a short time away from Anchorage until they were forced down by a passing MiG fighter, and fortunately were able to land on a frozen lake somewhere near Murmansk. They were over Siberia, not Alaska.
Yes, they knew all about Grid navigation, but knew nothing about correcting for gyro precession, so the gyros had worked as designed, and carefully and consistently steered the aircraft in a nice curved arc, unfortunately to the right instead of left, which would have placed them somewhere over Canada. Murphy is always with us.
That same airline later lost another aircraft shot down flying between Anchorage and Seoul due to a navigation error. I'm occasionally asked if there is any airline that I wouldn't fly with. I have an answer, but my lips are sealed.