The 4/50 cost £904 at it's introduction, and could have expected to be a sales success, as there was little competition at this price level. However, it's sales between 1948 and 1952 were disappointing at only 8,950 against 25,280 for the larger 6/80 for it's full production run, so the 4/50 was discontinued in November 1952, making way for the technically simpler 4/44.