Probably a Big Ben - Black (SB 707)

Nib: 14 Kt fine

The imprint on the barrel of this pen is "MATCHER-COLOMBES 24", but the nib is a Big Ben 14 Kt fine. Big Ben was made in Denmark for the Benzon Trading Company who also made Hoover and London, all directed toward the English market. While the nib may have been a swap, I suspect the whole pen is Big Ben, which means it's well made and reliable. This one is good sized button filler with a new sac. 5 7/16", 137 mm.
$85