By 1955 The 6" wide rib Masterpieces that first appeared in the 1950 All Model circular supplementing the tapered barrel versions have totally supplanted them,

Interesting because the 4" cm and 6" Tapered Masterpiece had the same frame styling that mate to their narrow barrel rib where the 6" and 4" continue now with different frame and barrel styles.



The 1955 K22 Combat Masterpiece serial K246498 continued as a 5 screw frame with 6 groove tangs and High Speed hammer but now standard in high polish "Bright Blue" instead of the older matte blue.


slight changes again to the ampersand