Chapter VIII. 1860 – 1867: 58. 1863-1873: Pin-Fire vs Center Fire
The chapter has been edited to include observations on two styles of center-break, Central Fire rifles and shotguns being offered in the 1865-1869 time period,
-- Thin fence, noseless hammer guns which copied pin-fire type actions, which was widely used 1865-1870
-- Broader and deeper fences with a back splash guard and normal hammer, which became ubiquitous from 1870 - 1930
. . . . . .based on the following line:
https://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=645601#Post645601I will add that this attempt at understanding the relationship between "Central Fire" guns from 1865 and their pin-fire precedents began with this misunderstanding. I looked at the Dickson and immediately said, "converted pin-fire." The Dickson records say otherwise. It stuck in the mind and this germinated into the above understanding:
https://doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=635255