Hello Ron and welcome,

Halifaxes were the "lower grade" Darnes. Their quality leaves nothing to be desired and not all of them are "plain Janes". Their mechanics
are the same as the Darne R series.

Surely you will get lots of information at the mentioned site.

Here are some photos of my Halifax for your reference.It is 12 bore with 65mm chambers.




Best,

JC


"...it is always advisable to perceive clearly our ignorance."ť Charles Darwin