good point, re: ribs. Am following with interest as have a BV1 side lever hammergun. Not this one but you get the idea.
https://www.hollandandholland.com/2017/05/brevis-collection-lady-churchills-28-bore/
12 ga - ding
non-original fore-end - ding!
27" barrels - ouch!
(Not engraved "Lady Churchill" either) Style is actually a little different as the lever is more rearward.