Distance between centres 6.2 cm.

When the Germans saw that the whole British and Belgian army had got away from them they moved up their 42 cm.

Occasionally, when we spoke a word of English, some officer would shoot us a 42 cm. glance and demand our papers.

I've split 'cm from stem to keelson more than once, and never used a copper in my lifeplayed 'em wide open, all the time.