Here was me, quite happily following Mr Freeman's research and I accidently stumble down a Gouby rabbit hole with date widths of 1870 pennies.
I have one (https://www.ngccoin.uk/certlookup/8464303-003/58/) with a 12 tooth date width, and another (much poorer condition) with a 13 tooth date width.
I believe the 11 tooth is the "normal", the 11.5 tooth is very scarce(?) But what of the 12 and 13 tooth? Any additional value for these?