Buck, great set from a great maker. The numbered tool you are unfamiliar with is a hollow pointing tool for a bullet mold. Not compatible with the pattern mold you have so it may have had a different or an additional one originally. The wood 450 marked tool is a wad tamper and possibly the blade is for cleaning the mouth edge of the brass case. Sometimes there is a separate tool for this purpose. The 3 part tool is for case sizing as you note. The leather travelling case looks to have been relined at some point.

I shall join everyone else in their envy, I'd happily give it a home!

Regards,
John