If you are already a fan of the IBM buckling spring model M keyboard (like the 1391401).. then you might consider the IBM 71G4644 model M.
The 71G4644 shares many of the same parts as the buckling-spring model M keyboards.. but instead of 101 individual springs, it uses heavy rubber domes to remove the "clicky" sound.. but still gives satisfying "tactile" bump feel.
https://clickykeyboards.com/product-cat ... iet-touch/
Since the overall key shape, key arrangement and internal electronics, is identical between a 71G4644 and a 1391401, it makes going back and forth between different keyboards a breeze (you don't have to remap your brain and fingers to avoid typos between different keyboards).
The number of shared parts that IBM used between the 1391401 and 71G4644 is perhaps 65%-75% the same components. *exceptions are the heavy rubber that replace the springs and the slightly different internal construction of the 101 keycap-keystems. Otherwise, most of the other IBM plastic casing and electronic parts are interchangeable.
Fully enjoy the 1391401 at your home-office battlestation and then use the 71G4644 at work cubicle. (until you can get your own corner office and then you can close the door and bring in the heavy artillery).